Vitamin and mineral levels
Folateand Red Cell Folate
Only one source here so far, and it found no clear difference in red Cell Folate.
How sure anyone can be
Low certainty, level 2 of 4Further research is likely to change this.
The numbers reported
No number has been put on this yet. One source recorded only which way the numbers went — for now, that is all we have here.
One source, newest first
What we read is the published abstract, not the full paper, so a blank below may still be printed in the paper itself. A fixed rule worked this out from the source’s own fields. Nobody checked this rating by hand.
Randomised trial, 2021
Low certainty, level 2 of 4Impact of high-dose folic acid supplementation in pregnancy on biomarkers of folate status and 1-carbon metabolism: An ancillary study of the Folic Acid Clinical Trial (FACT).
Am J Clin Nutr. 2021;113(5):1361-1371. doi:10.1093/ajcn/nqaa407. PMID:33675351.
- Number reported
- Not in the abstract
- Which way it went
- No clear difference
- Likely range
- Not in the abstract
- Source’s own words
- no between-group difference reported; cohort median RBC folate was 2701 nmol/L
- Who was studied
- Pregnant
- Compared with
- low-dose folic acid (usual supplementation <=1.1 mg/d)
- Amount taken
- 4 to 5.1 mg/d folic acid (4.0 mg high dose plus usual supplement <=1.1 mg, vs usual supplement alone)
- For how long
- 56 to 126 days
- Disagreement between studies
- Not in the abstract
- Kind of record
- Journal article
How this rating was reachedstarts at High, 2 steps down: risk of bias and imprecision
- Starts at High
- Risk of bias brought it down to Moderatethe abstract reports no risk-of-bias or quality appraisal, so study limitations cannot be ruled outNot in the abstract
- Imprecision brought it down to Lowthe abstract reports no confidence interval for the estimateNot in the abstract
- Ends at Low2 steps down.
- Checked, nothing to step it down for
- indirectness
- Inconsistency
- One study, so there was nothing to disagree
Imprecision stops at the first check that applies; others may apply too.
AI review could not confirm it — an AI agent re-read this finding against the saved source and at least one check failed. The batch record names the check and quotes the sentence that caused the doubt. No person read it.
What is still missing from these readings
- No number at all, only which way it went.
- One gives no likely range, so how precise that number is is unknown.
- One do not say how many people took part.
Something nobody wrote down is never a zero and never a guess.
Nothing left on our list for Folate
All eight things on our list for Folate have been read. That is rare here.
Still to read means nobody here has got to it, not that it was tried and did nothing or that no research exists. A pairing on no list is not a gap: we never set out to read it.
Read next
Folate
Seven other questions read for it
Vitamin and mineral levels
15 questions read under it
Red Cell Folate
No other ingredients read against it
Alphabetical, and by nothing else.
This is a library, not advice. No recommendation, no dose, no diagnosis, no ranking. We never ask about your symptoms, and nothing here is tailored to you.