What is the best form of folate?
2 forms compared by what actually reaches your bloodstream. Absorption ranges from 85% to 95% — a difference that matters more than the milligrams on the label.
Ranked by absorption
Higher means more of the dose reaches youShort answer
Folate (5-MTHF) absorbs best — 95%.
DNA synthesis & fetal development. Typical dose 400-800 mcg, about $20 a month. The cheapest option is Vitamin B9 (Folic Acid) at $5, but it only absorbs at 85%.
Every form side by side
| Form | Absorbed | Safety | Per month | Dose | Evidence |
|---|---|---|---|---|---|
| Folate (5-MTHF) | 95% | 9/10 | $20 | 400-800 mcg | A |
| Vitamin B9 (Folic Acid) | 85% | 8/10 | $5 | 400-800 mcg | A |
Head to head
How to read this
- Absorption is the share of the dose that reaches your bloodstream — the number that decides whether the milligrams on the label mean anything.
- A cheaper form at half the absorption is not cheaper per unit delivered.
- Safety here reflects tolerance at normal doses, not toxicity risk.
- Evidence A means the form itself was studied, not just the parent compound.
Common questions
What is the best form of folate?
Folate (5-MTHF) — it absorbs at 95%, the highest of the 2 forms here. DNA synthesis & fetal development. Typical dose 400-800 mcg.
Which form of folate is worst absorbed?
Vitamin B9 (Folic Acid) at 85%. It is usually the cheapest option, which is exactly why it ends up in budget products.
Is the expensive form of folate worth it?
Compare per unit delivered, not per bottle. Vitamin B9 (Folic Acid) costs $5 a month at 85% absorption, Folate (5-MTHF) costs $20 at 95%.
How much folate should you take?
Doses differ by form: Folate (5-MTHF) 400-800 mcg; Vitamin B9 (Folic Acid) 400-800 mcg.