Check before you startThis one has documented interactions with medication classes where the consequences are serious. If you take any prescription medicine, run it past a pharmacist before starting.
How long to take it
From at least one month before conception through the first trimester, and often throughout pregnancy.
Who it's actually for
Anyone who could become pregnant. Neural tube closure happens before most people know they're pregnant.
Safe upper limit
Unverified1,000 mcg per day of supplemental folic acid
High supplemental folic acid can mask B12 deficiency while nerve damage progresses underneath.
No source attached yet. Treat this as a starting point, not a citation, until reviewed.
Interactions to know about
- Anti-seizure medication — Phenytoin, valproate, carbamazepine, lamotrigine
- Methotrexate — Folate antagonist
Other supplements:
Run your full list through the interaction check.
Practical notes
- Start before trying, not after a positive test.
- Some conditions and medications require a much higher prescribed dose — ask.