Alkaline baking powder is not harmful to the body, if it contains alum content, it is harmful to the body. Baking powder belongs to a kind of fast leavening agent, mainly used for food fermentation, such as cakes, buns, steamed bread, bread, etc., baking powder is a kind of chemical agent there are two kinds of baking powder, one kind of baking powder is alkaline, and its main ingredients are sodium bicarbonate, ammonium bicarbonate, and water reaction to generate carbon dioxide gas, basically, there is no harm to the human body. The other is a composite of the main ingredients are alum and ammonium alum. Alum contains aluminum, if you use chemical baking powder, or choose baking powder containing alum, it will affect the development of nerve cells, may cause dementia, cardiovascular and cerebrovascular diseases, so it is harmful to the human body. If you want to use baking powder, it is recommended to use alkaline baking powder, which is harmless to the body and can be used without fear.