L-Phenylalanine is an optical isomer of the essential aminoacid Phelylalanine, required for the production of tyrosine and key brain chemicals, regulating the mood, appetite, and pain. Phenylalanine is available without prescription in Australia, but it is best to get doctor's approval if considering taking it. Phenylalanine supplements may interact with other medicines and should not be taken by people suffering from phenylketonuria.

L-Methionine is an essential amino acid, found in foods not commonly eaten by vegans or vegetarians. It contributes to the synthesis of S-adenosyl-L-methionine (SAMe), which is necessary for normal brain function, and L-Cysteine, which is a component of glutathione, an important antioxidant molecule in the body. Methionine is also a transporter of the antioxidant mineral, selenium. L-Methionine helps to break down fats and assists with Choline production and transport of selenium and zinc. Cells in the liver and kidneys especially need this amino acid for regeneration. Signs of L-Methionine deficiency include poor skin tone, hair loss and impaired elimination of toxins.