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
Women's health
The comparison is unconfirmed, so the findings cannot establish this ingredient’s effect.
Some publications still need interpretation checks and are kept separate from the findings below.
Some findings concern patients or people with a deficiency.
- Publications for this topic
- 10
- Human comparison publications
- 0
- Publications needing review
- 7
Findings in the studies
incidence of NTDs
Other human research, including observational studies and reviews
- A change was reported, but the comparison could not be confirmed.Patient group · Periconceptional supplementation
Measurement and study conditions
- Study type
- Systematic review
- Study population
- Human participants · Patient group
- Ingredients tested
- Unknown intervention
- How results were compared
- Study comparison: one trial of NTD incidence; the abstract reports no evidence of an effect and does not name the comp
- Additional measurement information
- Primary outcome
- Measurement time
- Periconceptional supplementation
low birth weight
Research with unclear study subject or type
- A change was reported, but the comparison could not be confirmed.
Measurement and study conditions
- Study type
- Review
- Study population
- Recorded population category: Patient group. Whether the research involved humans needs confirmation.
- Ingredients tested
- Unknown intervention
- How results were compared
- Study comparison: Review summary of folic acid and folate supplementation evidence
- Additional measurement information
- Secondary outcome
- Measurement time
- Preconception through first trimester, as discussed in review
neural tube defects
Research with unclear study subject or type
- A change was reported, but the comparison could not be confirmed.Single ingredient
Measurement and study conditions
- Study type
- Review
- Study population
- Recorded population category: General population. Whether the research involved humans needs confirmation.
- Ingredients tested
- Single ingredient
- How results were compared
- Study comparison: USPSTF evidence update; no individual trial comparator reported
- Additional measurement information
- Primary outcome
- Measurement time
- Not confirmed.
- A change was reported, but the comparison could not be confirmed.
Measurement and study conditions
- Study type
- Review
- Study population
- Recorded population category: Patient group. Whether the research involved humans needs confirmation.
- Ingredients tested
- Unknown intervention
- How results were compared
- Study comparison: Review summary of folic acid and folate supplementation evidence
- Additional measurement information
- Primary outcome
- Measurement time
- Preconception through first trimester, as discussed in review
This result is held for interpretation. That does not mean research found no effect.
Outcome groups needing additional review (2)
- prevent neural tube defects (NTDs) · Distinct papers needing additional review: 1Evidence criteria check: 1
- risk of neural tube defects · 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.
Representative outcome and study details
Studies with an unspecified organism reported a change with no confirmed comparison group in neural tube defects.
These conditions come from related studies and may not describe a single paper.
Single-ingredient studies · Scope not specified · Includes patient groups · 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: 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 10 · distinct papers 10 · comparison findings need further review · papers needing additional review 7
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.
- incidence of NTDs: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- low birth weight: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- neural tube defects: Sources represented in this measurement group: 2 · Distinct papers with human comparisons for this outcome: 0
- prevent neural tube defects (NTDs): Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- risk of neural tube defects: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
What the research found
incidence of NTDs
A change was reported, but the comparison could not be confirmed.
Review · 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.
low birth weight
A change was reported, but the comparison could not be confirmed.
Review · 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.
neural tube defects
A change was reported, but the comparison could not be confirmed.
Review · 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.
neural tube defects
A change was reported, but the comparison could not be confirmed.
Review · 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.
prevent neural tube defects (NTDs)
The study needs further checking before its result can be interpreted.
Review · Unknown intervention · Unspecified population
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.
risk of neural tube defects
The study needs further checking before its result can be interpreted.
Review · 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
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 · 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
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 · Unspecified population
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.
Review · Unknown intervention · Unspecified population
The comparison could not be confirmed.
Analysis coverage and paper counts
3 papers · 3 measured outcomes
3 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.
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.
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.