When used together, 5-HTP and L-TYROSINE can help suppress appetite, heighten mood, increase energy, alleviate depression and stimulate growth hormones to build and maintain healthy muscle. 5-HTP is a plant-derived amino acid that naturally increases the body’s serotonin levels, the chemical responsible for behavior, appetite, sleep and proper brain functions. L-TYROSINE is a nonessential amino acid that also helps control stress-related symptoms and functions as one of the building blocks of protein. Together, 5-HTP and L-TYROSINE can balance hormones, help reduce fat while building muscle and promote overall health and well being! 5-HTP: 5-HTP is naturally produced in the body. It can also be found in various plants including the seeds ofgriffonia simplicifolia, a West African shrub. 5-HTP TR 100mg Time Release is an amino acid that naturally increases the body’s level of serotonin, which helps balance emotions, behavior, appetite and sleep. L-TYROSINE: A precursor of the neurotransmitter dopamine and the adrenal hormones norepinephrine and epinephrine, L-TYROSINE is an amino acid that is found in rich foods including animal meats, wheat products, oatmeal and seafood. L-TYROSINE may heighten mental alertness, increase feelings of well being and offset physical and mental fatigue.