Iodine
Essential for thyroid hormone synthesis (T3/T4); supports breast and prostate health, immune function
Essential for thyroid hormone synthesis (T3/T4); supports breast and prostate health, immune function
150-300 mcg/day; above 1,100 mcg/day (the UL) only under a physician
Practical Guide
Available Forms
Potassium iodide, Lugol's solution (milligrams per drop; only under a physician), kelp, nascent iodine
Natural Food Sources
- •Seaweed
- •Iodized salt
- •Seafood
- •Dairy
Dosing should be individualized. Consult a qualified healthcare practitioner.
The Science
Evidence Base
Start low; selenium essential before iodine; too much iodine can cause an underactive or overactive thyroid, and people with Hashimoto's react at lower doses; above 1,100 mcg/day (Lugol's) only under a physician who checks thyroid tests
Works Well With
Safety Profile
- May interact with thyroid medications
- Can trigger Hashimoto's flares
- Antithyroid drugs
- Potassium iodide with ACE inhibitors or potassium-sparing diuretics (high potassium)
- Hyperthyroidism
- Hashimoto's or Graves' disease, or thyroid medicine, unless the prescriber agrees
Trusted Brands
Build Your Protocol
Work with a practitioner to design a personalized supplement protocol.
Find a PractitionerEducational purposes only. Consult a qualified healthcare provider before starting any supplement protocol.