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They are not recommended in pregnancy or breastfeeding, for those under 18, or with severe untreated medical conditions

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Treatment of adults with growth hormone (GH) deficiency with recombinant human GH

Methionine, a sulfur-containing, essential amino acid, is a precursor of S-adenosylmethionine, a cofactor for one-carbon metabolism and the final methyl donor for the methylation of DNA, RNA, proteins, and phospholipids.The methionine synthase plays a paramount role in the synthesis of nitrogenous bases (purines and pyrimidines) involved in the formation of DNA
