mechanistic
Analysis v1
Some people have a gene variation that makes it harder for their body to use folate, a B vitamin, but it doesn’t mess with vitamin B12 — and even if you have this gene, B12 supplements still work just fine.
Evidence from Studies
No evidence studies found yet.
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.