Iodine & Tyrosine provides nutritional support for the thyroid gland, which helps support healthy metabolism.* Tyrosine also supports healthy adrenal function.* Two thyroid hormones – thyroxine (T4) and triiodothyronine (T3) – regulate the body's metabolism of proteins, fats, and carbohydrates, directing how the body uses these compounds to produce energy.* Thyroxine supports cardiac output, heart rate, respiratory rate, and basal metabolic rate.* The thyroid gland cannot produce these two hormones without the presence of the amino acid L-tyrosine and the mineral iodine.*Thus, a deficiency of either the amino acid or the mineral or both can contribute to low thyroid hormone levels.* Thorne's Iodine & Tyrosine offers essential mineral and amino acid support for the thyroid gland.* Studies have shown that L-tyrosine may be beneficial for individuals feeling fatigued, a common expression of low thyroid or adrenal hormone levels.*