If the yogurt machine yogurt more than 20 hours can still eat it?
Yogurt fermentation bacteria are anaerobic bacteria, the general anaerobic bacteria are harmless, harmful little, such as gangrene, tetanus bacillus. Food in an anaerobic environment has little to worry about, that is, over fermentation can be very sour.
Because add in milk beneficial bacteria has basically lost activity, not good for the body of the flora. With its guest pasteurized milk, yogurt machine, fermented for four hours, yogurt will be successful fermentation.
If the yogurt fermentation time is too long, has not been good, it is recommended not to eat
