L-Phenylalanine is 100% pure pharmaceutical grade amino acid powder. Phenylalanine is an essential amino acid which is highly concentrated in the human brain and plasma. Phenylalanine is a precursor for Tyrosine and these two amino acids are used by the brain to manufacture neurotransmitters.
Specific Amino: L-Phenylalanine
Up to 1 gram away from food.
Best taken on an empty stomach with water or juice about an hour before meals