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    Iodine

    Morning with food

    Iodine is an essential trace mineral required for the synthesis of thyroid hormones, which regulate metabolism throughout the body. It is found naturally in seafood, seaweed, dairy products, and iodized salt. Iodine deficiency remains one of the most common nutritional deficiencies worldwide and is the leading preventable cause of intellectual disability.

    Gil Carvalho
    Gil CarvalhoTakes it
    Research Evidence
    Essential for thyroid hormone production and metabolic regulation
    Strong
    Prevents goiter and iodine deficiency disorders
    Strong
    Adequate intake associated with healthy energy metabolism
    Moderate
    Critical for fetal brain development during pregnancy
    Strong
    May support cognitive function in iodine-deficient populations
    Moderate
    Source: Examine.com

    Expert Evidence

    8 references from 3 experts

    “The next supplement I take is iodine... I supplement also from HSN and it's 150 micrograms taken once daily which is the RDA.”

    Doctor Reveals his complete Supplement Stack

    5:29
    2026
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    Safety & Cautions

    Side Effects

    • Metallic taste in mouth
    • Nausea or stomach upset at high doses
    • Thyroid dysfunction with excessive intake
    • Skin rash in sensitive individuals
    Iodine is generally safe at recommended doses, but excessive intake (above 1,100 mcg/day for adults) can trigger or worsen thyroid disorders including both hypothyroidism and hyperthyroidism. Individuals with autoimmune thyroid conditions such as Hashimoto's should exercise particular caution.
    Pairs Well With
    SeleniumZincVitamin D3Iron