Improvement after a supplement is not the same as a comparative result
Start with the comparison. A before-and-after change alone cannot isolate the contribution of an ingredient.
Beetroot Extract
Exercise performance
Human studies reported between-group improvement in 1,000-m run.
combination-ingredient studies · Individual ingredient effects cannot be separated · Human studies · between-group comparison
Publications for this result: 1
Other outcomes and study details
Distinct publications linked to this topic: 26
- Route, form, dose, or population details are incomplete, so the findings cannot be confirmed as directly comparable.
- Combination, formula, or class studies do not isolate this ingredient or establish synergy.
What has been studied?
Distinct human comparison papers: 10
Some studies tested several ingredients together. Those results cannot show this ingredient’s separate effect or establish synergy.
1,000-m run
- Comparison result:A better result than the comparison group was reported.General population · Combination study · two 1,000-m runs with recovery
Measurement and study conditions
- Controlled human study
- Randomized trial
- Ingredient combination
- General population
- Primary outcome
- Between-group comparison
- Timepoint: two 1,000-m runs with recovery
- Study comparison: caffeine plus beetroot juice versus placebo and beetroot juice
1500-m TT
Other human research, including observational studies and reviews
- A change was reported before and after use. Its cause cannot be isolated.General population · Single ingredient
Measurement and study conditions
- Controlled human study
- Randomized trial
- Single ingredient
- General population
- Primary outcome
- Within-group comparison
- Timepoint: Eight-day supplementation; acute day 1 and chronic day 8
- Study comparison: Beetroot juice versus nitrate-free beetroot placebo in crossover design
Endurance Shuttle Walk Time
- Comparison result:A better result than the comparison group was reported.Patient group · Combination study
Measurement and study conditions
- Controlled human study
- Randomized trial
- Ingredient combination
- Patient group
- Outcome role not specified
- Between-group comparison
- Timepoint: unspecified
- Study comparison: unspecified
exercise time
- Comparison result:A better result than the comparison group was reported.Patient group · Combination study · acute
Measurement and study conditions
- Controlled human study
- Randomized trial
- Ingredient combination
- Patient group
- Primary outcome
- Between-group comparison
- Timepoint: acute
- Study comparison: Beetroot juice vs placebo
Other measured outcomes (13)
Isokinetic knee flexion power
Other human research, including observational studies and reviews
- A change was reported before and after use. Its cause cannot be isolated.General population · Single ingredient
Measurement and study conditions
- Controlled human study
- Controlled trial
- Single ingredient
- General population
- Secondary outcome
- Within-group comparison
- Timepoint: Testing three hours after the final supplement
- Study comparison: Nitrate-rich versus nitrate-depleted beetroot juice in a crossover comparison; knee flexion power di
maximal knee extensor speed (Vmax)
- Comparison result:A better result than the comparison group was reported.General population
Measurement and study conditions
- Controlled human study
- Randomized trial
- Unknown intervention
- General population
- Primary outcome
- Between-group comparison
- Timepoint: acute; during the approximately 3-hour experiment
- Study comparison: acute nitrate-rich beetroot juice versus placebo
mean power
- Comparison result:A better result than the comparison group was reported.General population · Single ingredient · 2 hours before exercise
Measurement and study conditions
- Controlled human study
- Controlled trial
- Single ingredient
- General population
- Secondary outcome
- Between-group comparison
- Timepoint: 2 hours before exercise
- Study comparison: counterbalanced crossover BRJ vs placebo
muscle strength gains
Research with unclear study subject or type
- Results for this measurement were mixed; no consistent conclusion can be drawn.General population
Measurement and study conditions
- Review
- Systematic review
- Unknown intervention
- General population
- Primary outcome
- Between-group comparison
- Study subject not identified
- Timepoint: Acute or chronic dosing; optimal timing described as 2–2.5 hours before exercise for specified proto
- Study comparison: Nitrate supplementation versus placebo across studies; 6 of 12 studies observed an ergogenic effect
Peak power output
- Comparison result:A better result than the comparison group was reported.Combination study
Measurement and study conditions
- Controlled human study
- Randomized trial
- Ingredient combination
- Unspecified population
- Outcome role not specified
- Between-group comparison
- Timepoint: unspecified
- Study comparison: unspecified
peak walking time
- Comparison result:A better result than the comparison group was reported.Patient group · Combination study
Measurement and study conditions
- Controlled human study
- Randomized trial
- Ingredient combination
- Patient group
- Primary outcome
- Between-group comparison
- Timepoint: 3 hours for plasma nitrite; during exercise testing
- Study comparison: beetroot juice vs placebo
power (Pmax)
- Comparison result:A better result than the comparison group was reported.General population
Measurement and study conditions
- Controlled human study
- Randomized trial
- Unknown intervention
- General population
- Primary outcome
- Between-group comparison
- Timepoint: acute; during the approximately 3-hour experiment
- Study comparison: acute nitrate-rich beetroot juice versus placebo
resistance exercise performance
Other human research, including observational studies and reviews
- A change was reported, but the comparison could not be confirmed.General population · Single ingredient · 2.5 hours after supplementation
Measurement and study conditions
- Controlled human study
- Randomized trial
- Single ingredient
- General population
- Primary outcome
- Timepoint: 2.5 hours after supplementation
- Study comparison: Beetroot juice with negligible, low, moderate, or high nitrate versus placebo
rowing time
- Comparison result:A better result than the comparison group was reported.General population · Single ingredient
Measurement and study conditions
- Controlled human study
- Randomized trial
- Single ingredient
- General population
- Secondary outcome
- Between-group comparison
- Timepoint: after 6 days of daily supplementation
- Study comparison: beetroot beverage versus placebo
Time-to-exhaustion
Other human research, including observational studies and reviews
- A change was reported, but the comparison could not be confirmed.Combination study
Measurement and study conditions
- Controlled human study
- Randomized trial
- Ingredient combination
- Unspecified population
- Outcome role not specified
- Timepoint: unspecified
- Study comparison: unspecified
Total work done during the sprints of the IST
- Comparison result:A better result than the comparison group was reported.General population · Day seven of supplementation
Measurement and study conditions
- Controlled human study
- Randomized trial
- Unknown intervention
- General population
- Primary outcome
- Between-group comparison
- Timepoint: Day seven of supplementation
- Study comparison: Nitrate-rich beetroot juice versus nitrate-depleted beetroot juice during intermittent sprint testin
Vo(2)
- Comparison result:A better result than the comparison group was reported.General population · Single ingredient
Measurement and study conditions
- Controlled human study
- Randomized trial
- Single ingredient
- General population
- Biomarker
- Between-group comparison
- Timepoint: 6 days; exercise tests on days 4–6
- Study comparison: nitrate-rich beetroot juice versus placebo
walk distance
Research with unclear study subject or type
- A change was reported, but the comparison could not be confirmed.Patient group
Measurement and study conditions
- Meta-analysis
- Meta-analysis
- Unknown intervention
- Patient group
- Secondary outcome
- Study subject not identified
- Timepoint: Pulmonary-rehabilitation study and short-term studies
- Study comparison: Exercise-capacity results varied by context; abstract does not state a single comparator
This result is held for interpretation. That does not mean research found no effect.
Outcome groups needing additional review (13)
- average repetition time · Distinct papers needing additional review: 1Direction unclear: 1
- countermovement jump performance · Distinct papers needing additional review: 1Evidence criteria check: 1
- GXT trials · Distinct papers needing additional review: 1Evidence criteria check: 1
- isometric strength recovery · Distinct papers needing additional review: 1Evidence criteria check: 1
- modified Yo-Yo IR1 test · Distinct papers needing additional review: 1Evidence criteria check: 1
- MPO · Distinct papers needing additional review: 1Evidence criteria check: 1
- PPO · Distinct papers needing additional review: 1Evidence criteria check: 1
- time to task failure · Distinct papers needing additional review: 1Evidence criteria check: 1
- time-trial · Distinct papers needing additional review: 1Evidence criteria check: 1
- TT performance · Distinct papers needing additional review: 1Evidence criteria check: 1
- TTE · Distinct papers needing additional review: 1Evidence criteria check: 1
- V̇o2peak · Distinct papers needing additional review: 1Evidence criteria check: 1
- work decrement · Distinct papers needing additional review: 1Evidence criteria check: 1
One paper can appear under multiple measured outcomes or review reasons, so these counts should not be added together.
Research topics to explore
Research topics to explore
Review findings reported in each research area.
Topics with more linked papers appear first.
- View selected result
Exercise performance
Related papers 26 · human comparison papers 10
- View results
Blood pressure and vascular health
Related papers 19 · human comparison papers 3
- Diastolic BP · Improvement reported
- SBP · Improvement reported · Some studies used more than one ingredient · Some studies included patients or people with a deficiency
More outcome groups: 7
- View results
Cognition
Related papers 2 · human comparison papers 1
- Reaction time of response to the cognitive tasks · Improvement reported
- cognitive function · Interpretation held
- View results
Bone, joint, and mobility
Related papers 1 · human comparison papers 1
- maximal knee extensor torque · Improvement reported · Some studies included patients or people with a deficiency
- View results
Fatigue and energy
Related papers 1 · comparison findings need further review
- View results
Glucose and metabolic health
Related papers 1 · comparison findings need further review
- insulin · Finding details are limited
- View results
Stress and mood
Related papers 1 · comparison findings need further review
- markers of oxidative stress · Interpretation held
Data coverage and detailed study classifications
Paper counts are separated by research topic below. One paper may contribute to multiple findings.
Analysis status: Public-ready
Ingredient analysis date:
How the grade was determined: B
The 66.2 evidence score includes 12 independent human studies and 10 clinical studies in the representative benefit area. The B tier reflects evidence directness, repetition, and consistency together.
The grade is based mainly on the research area with the most evidence. It does not mean the same result was found in other areas.
Papers linked to this ingredient overall: 80
Papers linked to this topic 26 · distinct papers 26 · papers with a confirmed human comparison 10 · papers needing additional review 11
Ingredient-wide papers, topic-linked papers, and sources in outcome groups use different scopes. Adding source counts may count the same paper more than once.
- 1,000-m run: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 1
- 1500-m TT: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- average repetition time: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- countermovement jump performance: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- Endurance Shuttle Walk Time: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 1
- exercise time: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 1
- GXT trials: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- Isokinetic knee flexion power: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- isometric strength recovery: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- maximal knee extensor speed (Vmax): Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 1
- mean power: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 1
- modified Yo-Yo IR1 test: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- MPO: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- muscle strength gains: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- Peak power output: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 1
- peak walking time: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 1
- power (Pmax): Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 1
- PPO: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- resistance exercise performance: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- rowing time: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 1
- time to task failure: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- Time-to-exhaustion: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- time-trial: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- Total work done during the sprints of the IST: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 1
- TT performance: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- TTE: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- Vo(2): Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 1
- V̇o2peak: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- walk distance: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- work decrement: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
Exercise performance
What the research found
1500-m TT
A change was reported before and after use. Its cause cannot be isolated.
Controlled study in people · Single ingredient · General population
Within-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
1,000-m run
The study reported improvement in this measurement.
Controlled study in people · Ingredient combination · General population
Several ingredients were used together. This does not establish the effect of this ingredient alone or synergy.
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
Endurance Shuttle Walk Time
The study reported improvement in this measurement.
Controlled study in people · Ingredient combination · Patient group
Several ingredients were used together. This does not establish the effect of this ingredient alone or synergy.
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
exercise time
The study reported improvement in this measurement.
Controlled study in people · Ingredient combination · Patient group
Several ingredients were used together. This does not establish the effect of this ingredient alone or synergy.
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
Isokinetic knee flexion power
A change was reported before and after use. Its cause cannot be isolated.
Controlled study in people · Single ingredient · General population
Within-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
maximal knee extensor speed (Vmax)
The study reported improvement in this measurement.
Controlled study in people · Unknown intervention · General population
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
mean power
The study reported improvement in this measurement.
Controlled study in people · Single ingredient · General population
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
Peak power output
The study reported improvement in this measurement.
Controlled study in people · Ingredient combination · Unspecified population
Several ingredients were used together. This does not establish the effect of this ingredient alone or synergy.
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
peak walking time
The study reported improvement in this measurement.
Controlled study in people · Ingredient combination · Patient group
Several ingredients were used together. This does not establish the effect of this ingredient alone or synergy.
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
power (Pmax)
The study reported improvement in this measurement.
Controlled study in people · Unknown intervention · General population
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
rowing time
The study reported improvement in this measurement.
Controlled study in people · Single ingredient · General population
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
Total work done during the sprints of the IST
The study reported improvement in this measurement.
Controlled study in people · Unknown intervention · General population
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
Vo(2)
The study reported improvement in this measurement.
Controlled study in people · Single ingredient · General population
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
muscle strength gains
Results for this measurement were mixed; no consistent conclusion can be drawn.
Review · Unknown intervention · General population
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
Review overlap with primary papers is unknown; counts stay separate.
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
resistance exercise performance
A change was reported, but the comparison could not be confirmed.
Controlled study in people · Single ingredient · General population
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
Time-to-exhaustion
A change was reported, but the comparison could not be confirmed.
Controlled study in people · Ingredient combination · Unspecified population
Several ingredients were used together. This does not establish the effect of this ingredient alone or synergy.
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
walk distance
A change was reported, but the comparison could not be confirmed.
Meta-analysis · Unknown intervention · Patient group
Analysis coverage and paper counts
1 paper · 1 measured outcome
Review overlap with primary papers is unknown; counts stay separate.
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
average repetition time
The study needs further checking before its result can be interpreted.
Controlled study in people · Single ingredient · General population
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
countermovement jump performance
The study needs further checking before its result can be interpreted.
Meta-analysis · Ingredient combination · General population
Several ingredients were used together. This does not establish the effect of this ingredient alone or synergy.
Between-group comparison
Analysis coverage and paper counts
1 paper · 2 measured outcomes
1 papers held from direction counts
Review overlap with primary papers is unknown; counts stay separate.
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
GXT trials
The study needs further checking before its result can be interpreted.
Meta-analysis · Unknown intervention · General population
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Review overlap with primary papers is unknown; counts stay separate.
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
isometric strength recovery
The study needs further checking before its result can be interpreted.
Meta-analysis · Ingredient combination · General population
Several ingredients were used together. This does not establish the effect of this ingredient alone or synergy.
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Review overlap with primary papers is unknown; counts stay separate.
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
modified Yo-Yo IR1 test
The study needs further checking before its result can be interpreted.
Controlled study in people · Unknown intervention · General population
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
MPO
The study needs further checking before its result can be interpreted.
Controlled study in people · Ingredient combination · General population
Several ingredients were used together. This does not establish the effect of this ingredient alone or synergy.
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
PPO
The study needs further checking before its result can be interpreted.
Controlled study in people · Ingredient combination · General population
Several ingredients were used together. This does not establish the effect of this ingredient alone or synergy.
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
time to task failure
The study needs further checking before its result can be interpreted.
Controlled study in people · Single ingredient · General population
The comparison could not be confirmed.
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
time-trial
The study needs further checking before its result can be interpreted.
Meta-analysis · Unknown intervention · General population
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Review overlap with primary papers is unknown; counts stay separate.
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
TT performance
The study needs further checking before its result can be interpreted.
Controlled study in people · Single ingredient · General population
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
TTE
The study needs further checking before its result can be interpreted.
Meta-analysis · Unknown intervention · General population
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Review overlap with primary papers is unknown; counts stay separate.
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
Unspecified measured outcome
The study needs further checking before its result can be interpreted.
Controlled study in people · Separable contribution · Unspecified population
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
Unspecified measured outcome
The study needs further checking before its result can be interpreted.
Controlled study in people · Single ingredient · Unspecified population
Between-group comparison
Analysis coverage and paper counts
2 papers · 2 measured outcomes
2 papers held from direction counts
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
Unspecified measured outcome
The study needs further checking before its result can be interpreted.
Controlled study in people · Single ingredient · Unspecified population
The comparison could not be confirmed.
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
V̇o2peak
The study needs further checking before its result can be interpreted.
Controlled study in people · Single ingredient · General population
The comparison could not be confirmed.
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
work decrement
The study needs further checking before its result can be interpreted.
Controlled study in people · Ingredient combination · General population
Several ingredients were used together. This does not establish the effect of this ingredient alone or synergy.
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
Blood pressure and vascular health
What the research found
Diastolic BP
The study reported improvement in this measurement.
Controlled study in people · Single ingredient · General population
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
SBP
The study reported improvement in this measurement.
Controlled study in people · Ingredient combination · Patient group
Several ingredients were used together. This does not establish the effect of this ingredient alone or synergy.
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
systolic BP
The study reported improvement in this measurement.
Controlled study in people · Unknown intervention · General population
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
nocturnal systolic BP variability
Results for this measurement were mixed; no consistent conclusion can be drawn.
Meta-analysis · Single ingredient · General population
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
Review overlap with primary papers is unknown; counts stay separate.
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
Blood pressure
A change was reported, but the comparison could not be confirmed.
Controlled study in people · Ingredient combination · Unspecified population
Several ingredients were used together. This does not establish the effect of this ingredient alone or synergy.
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
blood pressure
A change was reported, but the comparison could not be confirmed.
Meta-analysis · Unknown intervention · Patient group
Analysis coverage and paper counts
1 paper · 1 measured outcome
Review overlap with primary papers is unknown; counts stay separate.
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
24-h systolic BP
The study needs further checking before its result can be interpreted.
Controlled study in people · Unknown intervention · Patient group
Within-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
blood pressure
The study needs further checking before its result can be interpreted.
Controlled study in people · Single ingredient · General population
Within-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
blood pressure
The study needs further checking before its result can be interpreted.
Controlled study in people · Single ingredient · Patient group
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
blood pressure
The study needs further checking before its result can be interpreted.
Review · Single ingredient · Patient group
The comparison could not be confirmed.
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Review overlap with primary papers is unknown; counts stay separate.
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
diastolic BP
The study needs further checking before its result can be interpreted.
Controlled study in people · Single ingredient · Patient group
Within-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
flow-mediated dilation
The study needs further checking before its result can be interpreted.
Controlled study in people · Ingredient combination · General population
Several ingredients were used together. This does not establish the effect of this ingredient alone or synergy.
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
resting systolic blood pressure
The study needs further checking before its result can be interpreted.
Controlled study in people · Ingredient combination · General population
Several ingredients were used together. This does not establish the effect of this ingredient alone or synergy.
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
SBP
The study needs further checking before its result can be interpreted.
Animal study · indirect · Ingredient combination · Patient group
This finding comes from animal or cell research. It does not establish the same effect in people.
Several ingredients were used together. This does not establish the effect of this ingredient alone or synergy.
The comparison could not be confirmed.
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
SBP
The study needs further checking before its result can be interpreted.
Controlled study in people · Ingredient combination · General population
Several ingredients were used together. This does not establish the effect of this ingredient alone or synergy.
The comparison could not be confirmed.
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
SBP
The study needs further checking before its result can be interpreted.
Controlled study in people · Single ingredient · Patient group
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
Systolic blood pressure
The study needs further checking before its result can be interpreted.
Review · Ingredient combination · Unspecified population
Several ingredients were used together. This does not establish the effect of this ingredient alone or synergy.
The comparison could not be confirmed.
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Review overlap with primary papers is unknown; counts stay separate.
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
Unspecified measured outcome
The study needs further checking before its result can be interpreted.
Controlled study in people · Ingredient combination · Patient group
Several ingredients were used together. This does not establish the effect of this ingredient alone or synergy.
The comparison could not be confirmed.
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
Unspecified measured outcome
The study needs further checking before its result can be interpreted.
Controlled study in people · Single ingredient · Patient group
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
Cognition
What the research found
Reaction time of response to the cognitive tasks
The study reported improvement in this measurement.
Controlled study in people · Unknown intervention · General population
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
cognitive function
The study needs further checking before its result can be interpreted.
Controlled study in people · Ingredient combination · Patient group
Several ingredients were used together. This does not establish the effect of this ingredient alone or synergy.
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
Bone, joint, and mobility
What the research found
maximal knee extensor torque
The study reported improvement in this measurement.
Controlled study in people · Single ingredient · Patient group
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
Fatigue and energy
What the research found
Unspecified measured outcome
The study needs further checking before its result can be interpreted.
Controlled study in people · Ingredient combination · Patient group
Several ingredients were used together. This does not establish the effect of this ingredient alone or synergy.
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
Glucose and metabolic health
What the research found
insulin
A change was reported before and after use. Its cause cannot be isolated.
Controlled study in people · Single ingredient · General population
Within-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
Stress and mood
What the research found
markers of oxidative stress
The study needs further checking before its result can be interpreted.
Meta-analysis · Ingredient combination · General population
Several ingredients were used together. This does not establish the effect of this ingredient alone or synergy.
Between-group comparison
Analysis coverage and paper counts
1 paper · 2 measured outcomes
1 papers held from direction counts
Review overlap with primary papers is unknown; counts stay separate.
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
How to read research findings
How should I read research findings?
Research guidesNo clear difference and an uninterpretable result are different
A reported null comparison contains a result. An abstract without an interpretable comparison leaves a question unresolved.
Paper counts and study counts are different
Count original research separately from research that reanalyzes it. Publication volume is neither replication nor a quality rating.
Side effects and combination findings
Findings from this ingredient alone are shown separately from those involving another supplement or medication.
Caution findings
0
Findings from individual and combined use, plus reviewed cautions
Key precautions
No combination cautions are available to show in the current data. This does not guarantee safety.
Review 1 combination findings and 0 findings that outperformed an ingredient alone.
These findings were reported in studies. They do not predict an individual's experience.
Reported improvements with combinations
Combination findings are grouped by how the study compared them. This is not a recommendation to combine ingredients.
Combinations with reported improvement
The combination showed improvement, but each ingredient's contribution is unclear.
CaffeineIn a randomized crossover trial of 20 healthy males, the combination of caffeine and beetroot juice significantly improved 1,000-m running performance compared to placebo (p < 0.01).