What is L-Phenylalanine?
L-Phenylalanine is an amino acid, a "building block" of protein. There
are three forms of phenylalanine: D-phenylalanine, L-phenylalanine, and
the mix made in the laboratory called DL-phenylalanine. D-phenylalanine
is not an essential amino acid, and its role in people is not currently
understood. L-phenylalanine is an essential amino acid and is the only
form of phenylalanine found in proteins. Major dietary sources of
L-phenylalanine include meat, fish, eggs, cheese, and milk.
Phenylalanine is used for depression, attention deficit-hyperactivity
disorder (ADHD),Parkinson's disease, chronic pain, osteoarthritis,
rheumatoid arthritis, alcohol withdrawal symptoms, and a skin disease
Some people apply it directly to the skin for vitiligo.
How does it work?
The body uses phenylalanine to make chemical messengers, but it is not clear how phenylalanine might work.