乳酸
Lactic acid is primarily produced by lactic acid fermentation of sugar with lactic acid bacteria (similar to the bacteria used to produce yogurt). The sugar can be sucrose, fructose, or glucose obtained from corn, sugar beet or sugar cane. Because the lactic acid is derived from plant sources and not from milk or milk products, it does not contain any residual lactose. Therefore, people who are lactose intolerant can consume lactylates without concern.