Thyroid

The thyroid produces hormones—especially T3—that help regulate metabolism, energy use, and other bodily functions. Adequate iodine, selenium, and L-tyrosine support thyroid hormone production. 1 2

• T3, metabolism, and body fat: T3 promotes metabolism and helps convert fats and sugars into usable energy; higher thyroid levels are associated with leaner bodies. 3
• Glucose, tissues, and repair: Thyroid hormone increases glucose uptake, particularly in muscle and bone. Healthy thyroid function supports directing energy toward tissue repair and helps the brain use glucose. 4
• Iodine: The thyroid needs iodine to produce thyroid hormones. It can come from sources such as sea salt, kelp, and seaweed; diets low in iodine may put thyroid hormone production at risk. 5 6
• Selenium and tyrosine: Selenium helps iodine and L-tyrosine work together in thyroid hormone production; both selenium and sufficient L-tyrosine are identified as important for healthy thyroid function. 7 8