- Nervous System
- Free-Form
- Non-GMO
- A Dietary Supplement
- Vegetarian - Vegan
- Amino Acids
L-Phenylalanine is an essential amino acid that is necessary for the synthesis of protein. Because L-Phenylalanine can be readily converted into the amino acid tyrosine, which forms part of the structure of the neurotransmitters dopamine and norepinephrine, it is important for the maintenance of a healthy nervous system.