Selenium is a great micronutrient to take if you have Hashimoto's. Here's why: • It helps support thyroid function. Selenium is needed by proteins involved in the production of T3 thyroid hormone. • By supporting the immune system and protecting the thyroid gland from oxidative stress. Selenium supplementation has been shown in studies to help reduce thyroid antibodies. How much should you take? Some providers recommended doses as high as 400 to 500 mcg per day but I recommend dosing in the 100