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.
Folate
Selected research topic
Cognition
Human comparison studies did not find a clear difference in some measured outcomes.
Some findings concern patients or people with a deficiency.
- Publications for this topic
- 2
- Human comparison publications
- 1
- Publications needing review
- 0
Findings in the studies
cognitive composite scores
- No clear difference from the comparison group was found.Patient group · Single ingredient · 12 weeks
Measurement and study conditions
- Study type
- Randomized controlled trial: subjects were randomly assigned to groups for comparison.
- Study population
- Human participants · Patient group
- Ingredients tested
- Single ingredient
- How results were compared
- Results were compared between groups. · Study comparison: l-methylfolate versus placebo
- Additional measurement information
- Secondary outcome
- Measurement time
- 12 weeks
folate concentration
Research with unclear study subject or type
- A change was reported, but the comparison could not be confirmed.
Measurement and study conditions
- Study type
- Meta-analysis
- Study population
- Recorded population category: General population. Whether the research involved humans needs confirmation.
- Ingredients tested
- Unknown intervention
- How results were compared
- Study comparison: Higher vs lower folate concentrations in observational studies
- Additional measurement information
- Secondary outcome
- Measurement time
- cross-sectional; not robust in prospective analyses
Representative outcome and study details
Human studies reported no clear between-group difference in cognitive composite scores.
Single-ingredient studies · Human studies · Includes patient groups · between-group comparison
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: B
The 58.7 evidence score includes 0 independent human studies and 0 clinical studies in the representative benefit area. The B 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: 94
Papers linked to this topic 2 · distinct papers 2 · papers with a confirmed human comparison 1 · papers needing additional review 0
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.
- cognitive composite scores: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 1
- folate concentration: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
What the research found
cognitive composite scores
No clear difference in this measurement was found between the compared groups.
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.
folate concentration
A change was reported, but the comparison could not be confirmed.
Meta-analysis · Unknown intervention · 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.
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.
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.
Sodium ValproateValproate interferes with one-carbon metabolism and folate transport, potentially reducing folic acid efficacy and increasing congenital risks.