Organic acids such as lactic acid, a universal TIG (lactic acid), and also create formic acid (formic acid) makes the pH lower than 5.5, which promotes the growth of bacteria in the group. Lactobacillus
Milk, organic acids, including lactic acid (lactic acid) and also produces formic acid.(formic acid) make the pH dropped about 5.5 which promote the growth of bacteria in the Lactobacillus.