Absolute Nutritoin's Thyroid T3 Stimulant Free Original Formula is an all natural, pharmaceutical grade nutritional supplement specially formulated to burn fat fast. The active ingredients in Absolute Nutriton's Thyroid T-3 Original Formula increase the rate of conversion of T-4, the low activity hormone, to T-3, the high activity hormone. This causes an increase in basal metabolic rate, or BMR, which are the number of calories one burns at rest. This is accomplished without the use of stimulants but with drug-like potency. The main ingredient in Absolute Nutrition's Thyroid T-3 Original Formula, Gum Guggul Extract, delivers a powerful 300 mg of guggulsterones per dosage. Studies have shown guggulsterones to have thyroid stimulating activity, whereby there is an increase in the conversion of T-4 to T-3. Subjects showed not only a decrease in body fat, but lower cholesterol and blood triglyceride levels as well. Absolute Nutrition's Thyroid T-3 Original Formula also contains phosphates, which are found in high-energy compounds such as ATP and phosphocreatine. Thyroid activity is directly related to the amount of energy one possesses, thus it is important to ingest ample amounts of phosphates daily. Studies have shown that phosphates can prevent a decrease in T-3 and increase the BMR. Furthermore, phosphates have a positive effect on creatine storage, buffering lactic acid and increasing ATP. L-Tyrosine, an amino acid found in Absolute Nutrition's Thyroid T-3 Original Formula, is used by the thyroid gland for the production of Thyroxine, a vital hormone involved in regulating growth, metabolism, skin health and mental state. In fact, low levels of L-Tyrosine have been associated with hypothyroidism and will trigger a deficiency of the hormone norephinephrine at a specific brain location, which will result in depression and mood disorders.