Yeast powder contains mainly yeast and can be used daily for a variety of purposes such as fermentation and flavoring. When consumed in normal doses by normal people, yeast powder and yeast powder products are not harmful and can improve the taste of food and relieve loss of appetite. Although yeast contains purines, when added to flour as a leavening agent, the dosage is small enough not to cause hyperuricemia or gout attacks. As a leavening agent and flavoring agent, yeast powder will react with moisture, flour and other substances at the right temperature to produce carbon dioxide, which in turn will make the food added with yeast powder more fluffy and better tasting, without the sour taste, such as the process of making bread, steamed buns, and bun skins can be applied. Moreover, flour contains iron, magnesium, calcium and other mineral ingredients, which will be better absorbed by the body with the participation of yeast. And for people who are prone to food accumulation, moderate consumption of food with added yeast flour can also improve indigestion and other symptoms. However, like salt, sugar and other flavoring agents, it is not suitable to be consumed in large quantities, which may have an effect on the taste of the food, which in turn may be counterproductive and cause digestive discomfort. In addition, yeast powder itself is rich in a variety of nutrients, such as protein, B vitamins, dietary fiber, selenium, chromium, etc., so yeast powder itself is not harmful to the human body. The harm of yeast powder is mainly indirectly reflected in the food added, such as the production of bread, steamed buns, buns, etc. If a large number of consumption, may cause blood sugar fluctuations, the existence of obesity, high blood sugar and other people are not favorable.