Amino Acid supplements and Amino Acid formulas from Twinlab, including the popular fat burning Amino Acids. Research shows that the free form Amino Acid L-Carnitine has a dramatic effect on fat metabolism and the reduction of blood fats. L-Tyrosine plays an important role in the function of the adrenal, pituitary and thyroid glands, and stimulates the release of growth hormone which causes muscle growth and reduces body fat. Amino acids are essential for protein synthesis and many other metabolic functions. Twinlab's free-form amino acids are the purest form of amnio acid available and are absorbed into the bloodstream without need for digestion.