Mineral
Iodine (Potassium Iodide)
Also known as: KI, Potassium iodide
Essential for thyroid hormone synthesis. Deficiency common in many regions. Careful dosing needed.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Daily target & upper limit
150 mcg / day · UL 1100 mcgIodine (Potassium Iodide) has an established daily reference intake. See best forms, label synonyms, upper-limit warnings, and top-scoring supplements:
Iodine (Potassium Iodide) dosage reference →Primary uses
- Thyroid function
- Hormone production
- Metabolic support
How it works
- Incorporated into T3 and T4
- Essential for thyroid peroxidase
Dosage
- Typical range
- 150-300 mcg daily
- Timing
- Any
- With food
- Optional
- Duration
- Long-term safe at appropriate doses
- Special populations
- Pregnancy needs 220-290 mcg
Forms
- Potassium iodide
- Kelp
- Lugol's
Safety
Common side effects
- Metallic taste
Contraindications
- Autonomous thyroid nodules
Products containing Iodine (Potassium Iodide)
Top-scoring supplements in our catalog that list Iodine (Potassium Iodide) on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.
Evidence notes
Essential nutrient
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. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.