L-Ornithine
A non-protein amino acid that’s an intermediate in the urea cycle – which is used by the body to detoxify ammonia and dispose of excess nitrogen. Ornithine salts are sometimes added to nitric oxide (NO) boosters, as it can be used to regenerate...
L-Histidine
An essential amino acid in children and precursor to histamine and carnosine. Histidine is sometimes included in carnosine-boosting, bodybuilding supplements, but is generally unnecessary (beta-alanine alone is sufficient, as adequate histidine is available via...
Methionine
See L-Methionine.
L-Methionine
An essential, sulfur-containing amino acid and precursor to other important metabolites such as cysteine, taurine, carnitine, various phospholipids and S-adenosyl-methionine (SAM-e). The latter serves as a methyl donor for important biochemical reactions (such as methylation of DNA). Methionine also metabolizes to homocysteine, a risk factor for cardiovascular...
L-Glutamine
A conditionally-essential amino acid. L-glutamine is one of the most abundant amino acids in the body and participates in a wide variety of metabolic reactions. Glutamine is particularly important in the gut, where it functions as an energy source for the cells lining the small intestine. It also helps maintain glucose homeostasis and acid-base balance, and is needed for the synthesis of proteins and nucleic acids. Glutamine is a...
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