Best Vitamin D for Pregnancy
Top 4 products ranked
Last reviewed May 2026
Clinical dose: 1000–5000 IU
Why Vitamin D for Pregnancy
Vitamin D plays a important role in pregnancy. Essential for calcium absorption, bone health, immune regulation, and gene expression. Vitamin D3 (cholecalciferol) is significantly more effective than D2 (ergocalciferol) at raising and maintaining blood levels, making it the preferred supplemental form.
What dose to look for
Clinical studies typically use 1000–5000 IU of vitamin d. Clinical consensus supports 1000–5000 IU/day; RDA of 600 IU is considered conservative. Products below this range may not deliver meaningful results.
What form to look for
Avoid ergocalciferol — d2 — less effective than d3. Avoid vitamin d2 — less effective than d3. Look for cholecalciferol (d3) for better absorption.
What the research says
Vitamin D has strong clinical evidence for pregnancy benefits. Meta-analyses of 81+ trials confirm bone health benefits; immune and mood claims have mixed results Learn more
Super Nutrition
Simply One, Prenatal Multivitamin with Super Greens, Spices, Vitamin A, and Folate, 90 Tablets
cholecalciferol · 1200 IU
Thorne
Basic Prenatal, 90 Capsules
vitamin d3 · 1000 IU
Nature Made
Prenatal Folic Acid + DHA
vitamin d3 · 1000 IU
Solgar
Prenatal Nutrients
ergocalciferol · 400 IU