with L-lactic acid and D-lactic two optical isomers

Lactic acid, scientific name 2 - hydroxy acid. Molecule has an asymmetric carbon atom, an optically active, Therefore there is Lactic acid nd D-lactic two optical isomers. Industrial production of lactic acid side Method has fermentation and chemical synthesis. At home and abroad mainly L-lactic acid produced by fermentation; Chemical synthesis rule generates lactic acid powder  namely DL-lactic acid. Since only the metabolism of the human body The enzyme L-lactic acid, D-lactic acid if excessive intake can cause metabolic disorder or acidosis.Therefore, in the food industry, or in the manufacture of pharmaceutical applications, and polylactic acid esters, requires L-Lactic acid as raw materials.