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.
Vitamin B6
Selected research topic
Glucose and metabolic health
These studies examined an association between use and measured outcomes. They do not establish cause and effect.
- Publications for this topic
- 3
- Human comparison publications
- 1
- Publications needing review
- 1
Findings in the studies
diabetes incidence
Other human research, including observational studies and reviews
- An association was observed. This does not establish that the ingredient caused the change.General population
Measurement and study conditions
- Study type
- Observational study
- Study population
- Human participants · General population
- Ingredients tested
- Unknown intervention
- How results were compared
- Comparison unclear · Study comparison: dietary vitamin B6 intake and incident diabetes; observational cohort, not a supplement trial
- Additional measurement information
- Primary outcome
- Measurement time
- 30 years; mean 20.5 ± 8.9 years follow-up
risk of metabolic syndrome
Other human research, including observational studies and reviews
- An association was observed. This does not establish that the ingredient caused the change.General population · Single ingredient · cross-sectional survey period
Measurement and study conditions
- Study type
- Observational study
- Study population
- Human participants · General population
- Ingredients tested
- Single ingredient
- How results were compared
- Results were compared between groups. · Study comparison: highest versus lowest dietary intake quartile in adjusted model
- Measurement time
- cross-sectional survey period
Representative outcome and study details
Human studies reported an association with diabetes incidence.
Scope not specified · Human studies · comparator not confirmed
1 publications linked to this result
- Route, form, dose, or population details are incomplete, so the findings cannot be confirmed as directly comparable.
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 14.9 evidence score includes 1 independent human studies and 1 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: 90
Papers linked to this topic 3 · distinct papers 3 · papers with a confirmed human comparison 1 · papers needing additional review 1
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.
- diabetes incidence: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- risk of metabolic syndrome: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 1
What the research found
diabetes incidence
An association was observed. This does not establish that the ingredient caused the change.
Observational study · Unknown intervention · General population
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.
risk of metabolic syndrome
An association was observed. This does not establish that the ingredient caused the change.
Observational study · 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.
Unspecified measured outcome
The study needs further checking before its result can be interpreted.
Animal study · indirect · Unknown intervention · Unspecified population
This finding comes from animal or cell research. It does not establish the same effect in people.
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.
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.
Review 1 combination findings and 0 findings that outperformed an ingredient alone.
Findings to review with care
Side effects reported for the ingredient alone are separated from findings involving another supplement or medication.
Cautions 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.
IsoniazidInteractions with medications like isoniazid are mentioned as a cause of Vitamin B6 deficiency.
AntiepilepticsInteractions with certain antiepileptics are mentioned as a cause of Vitamin B6 deficiency.
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.
마그네슘In subjects with severe/extremely severe stress, the combination of magnesium and vitamin B6 resulted in a 24% greater improvement compared to magnesium alone (p=0.0203).