SupplementDuel

Iodine (Potassium Iodide)

Mineral

Essential for thyroid hormone synthesis. Iodized salt usually covers needs; supplement only if confirmed deficient.

thyroiddeficiency-correctionpregnancy
Typical dose
150 mcg daily
Evidence
Strong (multiple RCTs / meta-analyses)
Onset time
Cumulative: 2–8 weeks
Half-life
—
Forms
Capsule, Tablet, Liquid
Source
mineral
Best taken with
with food
Best time of day
morning
Bioavailability
5/5
Safety rating
3/5
Price per serving
$0.05
Vegan / GF / 3rd-party
✓ / ✓ / ✓
Find Iodine (Potassium Iodide)iHerb →

Vetted brands, third-party testing, ships worldwide.

Common uses

  • • Thyroid support
  • • Pregnancy
  • • Iodine deficiency

Effect profile

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Common side effects

  • • Acne
  • • Hyperthyroidism (high doses)
  • • Goitre (paradox)

Avoid if

  • • Hyperthyroid
  • • Graves' disease
  • • Hashimoto's (caution)

Drug interactions

  • • Lithium
  • • Anti-thyroid drugs

Related mineral supplements

Iodine (Potassium Iodide) vs ZincIodine (Potassium Iodide) vs Iron BisglycinateIodine (Potassium Iodide) vs Selenium (Selenomethionine)

Medical disclaimer

SupplementDuel is for educational purposes only and is not medical advice. Consult a physician before starting, stopping, or combining supplements.