Best Iodine for Pregnancy
Top 7 products ranked
Clinical dose: 150–500 mcg
Iodine and pregnancy
When it comes to pregnancy, Iodine is one of the most supporting nutrients to consider. Critical building block for thyroid hormones T3 and T4, which regulate metabolism, growth, and development. Kelp-based supplements can provide highly variable iodine content—standardized potassium iodide is more reliable for consistent dosing. Both deficiency and excess can disrupt thyroid function, so supplementation should be targeted.
How much iodine do you need
Research points to 150–500 mcg as the effective range for iodine. Common kelp and iodine supplement range. Lower doses may provide some benefit, but most studies showing clear results used this range.
What the research says
The clinical evidence for iodine in pregnancy is strong. Essential for thyroid hormone synthesis; WHO estimates 2 billion people worldwide have insufficient intake Learn more

Thorne
Basic Prenatal, 90 Capsules
potassium iodide · 150 mcg

Solgar
Prenatal Nutrients
potassium iodide · 150 mcg

Super Nutrition
Simply One, Prenatal Multivitamin with Super Greens, Spices, Vitamin A, and Folate, 90 Tablets
kelp · 290 mcg

21st Century VitaJoy Gummies
Adult Multi
potassium iodide · 80 mcg

Nature's Craft
Apple Cider Vinegar Gummies, 60 Gummies
potassium iodide · 50 mcg

Chewy Vites
Adults Hair, Skin & Nails Beauty Multivitamin, 60 Gummies
potassium iodide · 42 mcg

Centrum
Centrum Women Multigummies
40 mcg