A composition which includes Phenylalanine, Serine, Glutamine and GABA (γ-aminobutyric acid). The composition contains the essential amino acids Phenylalanine； Glutamine； the non-essential amino acid Serine； and GABA (γ-aminobutyric acid) in concentrations effective to influence or modulate the neurotransmitter pentapeptide enkephalin. The composition may further comprise tetrahydrocannabinol (THC).
