D-Lactic acid is the end product of the enzyme Glyoxalase II ([EC:3.1.2.6] hydroxyacyl-glutathione hydrolase) which converts the intermediate substrate S-lactoyl-glutathione to reduced glutathione and D-lactate. (OMIM 138790). The concentrated form is used internally to prevent gastrointestinal fermentation.
Belongs to the class of organic compounds known as alpha hydroxy acids and derivatives. These are organic compounds containing a carboxylic acid substituted with a hydroxyl group on the adjacent carbon.
Hartmut Voelskow, Dieter Sukatsch, “Process for the production of D-lactic acid with the use of Lactobacillus bulgaricus DSM 2129.” U.S. Patent US4467034, issued May, 1979.