Yogurt is fermented with fresh milk and lactic acid bacteria. After fermentation, the original lactose in milk turns into lactic acid, which is easy to digest, so it has a sweet and sour flavor, and its nutritional components are almost the same as those of fresh milk. It is a highly nutritious food, especially for middle-aged and elderly people with gastrointestinal dysfunction and lactose intolerance. It can maintain the balance of intestinal flora, promote intestinal peristalsis, improve intestinal environment, inhibit the growth and reproduction of harmful bacteria and improve human immunity.

Distiller's yeast must be added to liquor-making. The microorganisms in distiller's yeast are mainly yeasts, which decompose glucose into alcohol and carbon dioxide under anaerobic conditions.

So the answer is: lactic acid bacteria? yeast