BioStacks

Best Iodine for Hormones

Top 10 products ranked

Last reviewed May 2026

Clinical dose: 150–500 mcg

Why Iodine for Hormones

Iodine plays a supporting role in hormones. 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.

What dose to look for

Clinical studies typically use 150–500 mcg of iodine. Common kelp and iodine supplement range. Products below this range may not deliver meaningful results.

What the research says

Iodine has strong clinical evidence for hormones benefits. Essential for thyroid hormone synthesis; WHO estimates 2 billion people worldwide have insufficient intake Learn more