Yogurt replaces the staple food, and you can't lose weight without eating anything for the rest of the time. The reason for this is the following：

You can't drink yogurt on an empty stomach because lactic acid bacteria are active in a slightly acidic environment. When people are on an empty stomach, gastric juice is in a strong acid state. It is easy to kill lactic acid bacteria with yogurt at this time. If it is sour yogurt, it will stimulate the stomach and cause stomach discomfort.

Yogurt is not easy to drink too much, because the yogurt process is weakly acidic, which will destroy the original weak alkaline environment of the small intestine, not only affect the digestive function of the small intestine, but also may cause constipation or indigestion.