Betaine hydrochloride is a natural compound found in many foods and also an active methyl-donor which can maintain normal DNA methylation patterns, which has anti-hypoxic, hepatoprotective, sedative, antipyretic and analgesic effects. Betaine hydrochloride can increase the secreting of thyroxine (T3) and insulin and regulate the metabolism of organism by the hormones, thus it prompts fish growth and also improves intestine figuration.

L-methionine is the L-enantiomer of methionine. It has a role as a micronutrient, a nutraceutical, an antidote to paracetamol poisoning, a mouse metabolite and a human metabolite. It is a L-alpha-amino acid, a methionine, an aspartate family amino acid and a proteinogenic amino acid. It is a conjugate base of a L-methioninium. It is a conjugate acid of a L-methioninate. It is an enantiomer of a D-methionine. It is a tautomer of a L-methionine zwitterion. L-Methionine is marker of cell viability and estimating proliferative activity. L-Methionine and L-cystine can improve hyperlipidemia by restoring LPL and HSL activities, it also might be a new potential drug for Parkinson's disease treatment.