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.
Niacin
Selected research topic
Blood lipids
Some measured outcomes improved in human comparison studies. Read these findings with their populations and conditions.
Findings from a combination study cannot be attributed to this ingredient alone.
Some findings concern patients or people with a deficiency.
- Publications for this topic
- 11
- Human comparison publications
- 2
- Publications needing review
- 4
Findings in the studies
LDL
- Comparison result:A better result than the comparison group was reported.Patient group · Single ingredient · In-trial samples at 1 year
Measurement and study conditions
- Controlled human study
- Randomized trial
- Single ingredient
- Patient group
- Biomarker
- Between-group comparison
- Timepoint: In-trial samples at 1 year
- Study comparison: Extended-release niacin plus simvastatin versus placebo plus simvastatin
Non-high-density lipoprotein cholesterol
- Comparison result:A better result than the comparison group was reported.
Several ingredients were tested together, so this ingredient’s individual effect is unknown.
Patient group · Combination studyMeasurement and study conditions
- Controlled human study
- Randomized trial
- Ingredient combination
- Patient group
- Outcome role not specified
- Between-group comparison
- Timepoint: unspecified
- Study comparison: unspecified
HDL cholesterol
Other human research, including observational studies and reviews
- A change was reported before and after use. Its cause cannot be isolated.Patient group · Single ingredient · 16 weeks
Measurement and study conditions
- Controlled human study
- Randomized trial
- Single ingredient
- Patient group
- Secondary outcome
- Within-group comparison
- Timepoint: 16 weeks
- Within-group comparison
- A change was reported, but the comparison could not be confirmed.Patient group · Single ingredient
Measurement and study conditions
- Controlled human study
- Randomized trial
- Single ingredient
- Patient group
- Outcome role not specified
- Timepoint: unspecified
- Study comparison: unspecified
high-density lipoprotein cholesterol
Other human research, including observational studies and reviews
- An association was observed. This does not establish that the ingredient caused the change.Patient group · Single ingredient · 12 and 24 weeks
Measurement and study conditions
- Observational study
- Observational study
- Single ingredient
- Patient group
- Biomarker
- Comparison unclear
- Timepoint: 12 and 24 weeks
- Study comparison: niacin-group pre/post versus baseline; selected statin controls not randomized
Other measured outcomes (2)
HDL-C
Research with unclear study subject or type
- A change was reported, but the comparison could not be confirmed.General population · Single ingredient
Measurement and study conditions
- Meta-analysis
- Meta-analysis
- Single ingredient
- General population
- Biomarker
- Study subject not identified
- Timepoint: unspecified across included trials
- Study comparison: niacin trial set summarized separately from fibrate trial set; no direct head-to-head comparison est
triglyceride reductions
Research with unclear study subject or type
- The study reported improvement in this measurement.Patient group · Single ingredient
Measurement and study conditions
- Meta-analysis
- Meta-analysis
- Single ingredient
- Patient group
- Biomarker
- Between-group comparison
- Study subject not identified
- Timepoint: unspecified
- Study comparison: Niacin network rank among vitamin/mineral supplements; no pairwise estimate stated
This result is held for interpretation. That does not mean research found no effect.
Outcome groups needing additional review (1)
- HDLc · Distinct papers needing additional review: 1Direction unclear: 1
One paper can appear under multiple measured outcomes or review reasons, so these counts should not be added together.
Representative outcome and study details
Human studies reported both a within-group change and a change with no confirmed comparison group for HDL cholesterol.
These conditions come from related studies and may not describe a single paper.
Single-ingredient studies · Human studies · Includes patient groups · within-group comparison · comparator not confirmed
2 publications linked to this result
- Study conditions differ; results are shown descriptively and are not pooled.
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: C
The 16.3 evidence score includes 0 independent human studies and 0 clinical studies in the representative benefit area. The C tier remains conservative because of limited repetition across independent human clinical studies, too few clinical findings with an explicit effect direction.
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: 59
Papers linked to this topic 11 · distinct papers 11 · papers with a confirmed human comparison 2 · papers needing additional review 4
A publication may appear in more than one count. These numbers should not be added. 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.
- HDL cholesterol: Sources represented in this measurement group: 2 · Distinct papers with human comparisons for this outcome: 0
- HDL-C: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- HDLc: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- high-density lipoprotein cholesterol: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- LDL: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 1
- Non-high-density lipoprotein cholesterol: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 1
- triglyceride reductions: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
What the research found
HDL cholesterol
A change was reported before and after use. Its cause cannot be isolated.
Controlled study in people · Single ingredient · Patient group
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.
LDL
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.
Non-high-density lipoprotein cholesterol
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.
high-density lipoprotein cholesterol
An association was observed. This does not establish that the ingredient caused the change.
Observational study · Single ingredient · Patient group
The comparison could not be confirmed.
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.
triglyceride reductions
The study reported improvement in this measurement.
Meta-analysis · Single ingredient · Patient group
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.
HDL cholesterol
A change was reported, but the comparison could not be confirmed.
Controlled study in people · Single ingredient · Patient group
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.
HDL-C
A change was reported, but the comparison could not be confirmed.
Meta-analysis · Single ingredient · General population
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.
HDLc
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.
Unspecified measured outcome
The study needs further checking before its result can be interpreted.
Meta-analysis · Unknown intervention · 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.
Unspecified measured outcome
The study needs further checking before its result can be interpreted.
Other evidence · Unknown intervention · Patient group
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.
Review · Unknown intervention · 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.
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.
No reviewed caution rules are available yet. Reported caution findings are shown below.
Findings to review with care
Side effects reported for the ingredient alone are separated from findings involving another supplement or medication.
Side effects reported with this ingredient alone
Symptoms or adverse events reported in studies without another active ingredient.
Cutaneous vasodilation (flushing)1 papers
Niacin causes cutaneous vasodilation (flushing) as a strong side effect when used to treat dyslipidemias.Human studies · Study type not identifiedCautions reported with another supplement or medication
These studies reported worsening outcomes, reduced absorption, or other cautions with combined use. They do not predict an individual's outcome.
스타틴Increased risk of all-cause mortality observed when niacin is combined with statins.