Lactic acid (Standard) (DL-Lactic acid (Standard)) is the analytical standard of Lactic acid (HY-B2227). This product is intended for research and analytical applications. Lactic acid (DL-Lactic acid) is a hydroxycarboxylic acid receptor 1 (HCAR1) activator and an epigenetic modulator inducing lysine residues lactylation. Lactic acid is a glycolysis end-product, bridging the gap between glycolysis and oxidative phosphorylation. Lactic acid is an oncometabolite and has immune protective role of lactate in anti-tumor immunity[1][2]. Lactic acid also has antimicrobial activity, which can be used as a food preservative[3].