Safety Profile
Overall safety rating: Safe with Caution
Iodine (Thyroid) Side Effects & Safety
This content is for informational purposes only and does not constitute medical advice. Consult your healthcare provider before starting any supplement. Full disclaimer
Potential Side Effects
- Metallic taste in mouth
- Nausea and stomach upset at higher doses
- Excess iodine can trigger or worsen hypothyroidism or hyperthyroidism (Wolff-Chaikoff effect or Jod-Basedow phenomenon)
- Acne-like skin eruptions (iododerma) at high doses
Drug & Supplement Interactions
- May interfere with levothyroxine and other thyroid medications — monitor TSH
- Lithium combined with iodine increases hypothyroidism risk
- ACE inhibitors and potassium-sparing diuretics combined with potassium iodide may cause hyperkalemia
Maximum Dose
Do not exceed: 1,100mcg (1.1mg) daily Tolerable Upper Intake Level for adults (IOM)