How vitamin E affects thyroid health

Dosage and precautions

If you plan to take vitamin E supplements for any reason, including the health of your thyroid, discuss your doctor first.

According to the Cleveland Clinic, vitamin E supplements can increase your risk of bleeding if you take anticoagulants – drugs that stop or slow down the formation of blood clots. Supplements can also interfere with statins and niacin (taken to improve cholesterol) and with certain chemotherapy agents (used to treat cancer).

The recommended daily quantity of vitamin E for adults is 15 milligrams (MG) per day, or around 22 international units (IU). Most vitamin E supplements contain much more than that. To avoid the toxicity of vitamin E, adults are warned not to take more than 1,000 mg per day, 1,500 IU of D-Alpha-Tocopherol (Natural Vitamin E) per day, or 1,100 IU of DL-Alpha-Tocopherol (synthetic vitamin E) per day.