Mineral

Iodine

Also known as: I, Iodide, Potassium iodide, Sodium iodide

Evidence

Essential trace mineral for thyroid hormone production. Critical for metabolism, brain development, and energy.

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Daily target & upper limit

150 mcg / day · UL 1100 mcg

Iodine has an established daily reference intake. See best forms, label synonyms, upper-limit warnings, and top-scoring supplements:

Iodine dosage reference →

Primary uses

Thyroid hormone synthesis
Iodine deficiency
Goiter prevention
Thyroid hormone production
Metabolism
Brain development
Energy

How it works

Component of T3 and T4 thyroid hormones
Required for thyroid function
Supports metabolic rate

Dosage

Typical range: 150-300mcg daily
Timing: Any time
With food: Optional
Duration: Long-term at RDA
Special populations: Pregnancy requires more

Forms

Potassium iodide
Kelp
Nascent iodine

Safety

Common side effects

Usually well tolerated

Contraindications

Thyroid disorders without guidance

Products containing Iodine

Top-scoring supplements in our catalog that list Iodine on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.

Thorne

Thyroid Health Complex (formerly Thyrocsin)

Thorne

Basic Nutrients 2/Day

Known interactions

Warningwith thyroid medication
Iodine supplementation can destabilize thyroid

Evidence notes

Essential for thyroid function

Grade A: Multiple well-designed human trials support the main claims.

Related in Mineral

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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider.