Best Vitamin B9 for Pregnancy
Top 4 products ranked
Last reviewed May 2026
Clinical dose: 400–800 mcg
Why Vitamin B9 for Pregnancy
Vitamin B9 plays a key role in pregnancy. Critical for DNA synthesis, cell division, and methylation reactions. 5-MTHF (methylfolate) is the bioactive form that the body can use directly, unlike synthetic folic acid which requires multi-step conversion via the MTHFR enzyme.
What dose to look for
Clinical studies typically use 400–800 mcg of vitamin b9. Products below this range may not deliver meaningful results.
What form to look for
Avoid folic acid — synthetic, ~60% conversion rate. Look for methylfolate (5-mthf) for better absorption.
What the research says
Vitamin B9 has strong clinical evidence for pregnancy benefits. Strong evidence for neural tube defect prevention; 40-50% of people have MTHFR variants affecting conversion Learn more
Super Nutrition
Simply One, Prenatal Multivitamin with Super Greens, Spices, Vitamin A, and Folate, 90 Tablets
methyltetrahydrofolate · 1200 mcg
Thorne
Basic Prenatal, 90 Capsules
Mixed forms · 1700 mcg
Nature Made
Prenatal Folic Acid + DHA
folic acid · 800 mcg
Solgar
Prenatal Nutrients
folic acid · 800 mcg