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Lactic acid and muscles, molecular model
Lactic acid and muscles. Lactic acid (molecular models shown) is a carboxylic acid that is produced constantly in the body as part of normal metabolism. Excess lactic acid and its equivalent (lactate) builds up in the muscles (background) during exercise. Lactic acid is also produced by some bacteria used in food production and fermentation, and when present in the mouth these bacteria can contribute to tooth decay. Lactic acid is chiral and has two optical isomers. This is the L-form. Atoms are represented as spheres and are colour-coded: carbon (pale grey), hydrogen (white) and oxygen (red).
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