It is in the chemical compound classes of -hydroxyacids and quaternary ammonium compounds, and because of the hydroxyl-substituent, it exists in two stereoisomers, the biologically active enantiomer L-carnitine, and the essentially biologically inactive D-carnitine.[bettersourceneeded] Both are available through chemical synthesis,[not verified in body] and the L-form is continuously biosynthesized in eukaryotic organisms from the proteinogenic amino acids lysine and methionine
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Slow titration allows a gradual increase in the GLP-1RA dose, thereby helping to avoid nausea
Subcutaneous injection typically results in the commonly cited 2-3 hour half-life, while other routes, if viable for peptides, would have different pharmacokinetic profiles
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