Drinking weight loss coffee will not affect menstruation for most women for the following reasons: First, the main ingredient of weight loss coffee is bean extract, such as bean protein, bean amino acids, bean monosaccharides or polysaccharides. As sugar is easily digested in the body, it is not easily converted into fat, which is the weight loss mechanism of weight loss coffee, and will not interfere with the normal process of menstruation. Secondly, coffee belongs to the beverage, in some countries, coffee is a very common drink, daily life often drink, have greater benefits to the body, will not interfere with the normal physiological function. Even for women in special physiological periods, such as women in menstruation, drinking diet coffee will not interfere with the normal formation of menstruation as well as the duration and amount of menstruation. Thirdly, Chinese medicine believes that drinking diet coffee during menstruation can promote digestion and relieve digestive disorders during menstruation.