Phenylalanine, also known as LPA, is an essential amino acid that plays an important part in the formation of neurotransmitters in the brain. It can be found naturally in the milk of mammals and in many foods, including eggs, chicken, beef, and soybeans. Phenylalanine helps support brain function, aids in maintaining healthy mood, and may promote a calm sense of overall well-being.* Phenylalanine also supports healthy liver function.** These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.