The thyroid gland acts as the body’s thermostat and is one of the major regulators of metabolism. The two main hormones it produces are T3 and T4, which travel through the bloodstream to reach almost every cell in the body. Optimal thyroid function can help improve energy levels, metabolism, healthy weight management, motivation and concentration. Life Extension´s new Triple Action Thyroid formula combines critical nutrients that have been shown to support healthy thyroid function. Comprehensive Thyroid Support Triple Action Thyroid provides: Ashwagandha, an adaptogenic herb, demonstrated by research to support production of the thyroid hormone T4 in our body. Guggul, an extract of Commiphora mukul, clinically shown to support the activity of the enzyme that converts T4 into the most active thyroid hormone, T3. Korean Ginseng, clinically shown to reduce the inactive, thyroid hormone-inhibiting reverse T3 form, and support healthy levels of T3 and T4. For further enhanced benefits, the following additional nutrients are included in Triple Action Thyroid: Iodine and tyrosine, which are needed for the production of thyroid hormones. Vitamin A, an important nutrient for supporting healthy serum T3 levels. Vitamin B12, which is required in sufficient amounts for healthy thyroid activity.