Baking powder is a compound loosening agent, also known as foaming powder and baking powder. It is mainly used as a rapid loosening agent for flour products. However, baking powder is a chemical starter, and there are two types. One is alkaline, with the main ingredients being sodium bicarbonate and ammonia bicarbonate; the other is compound, with the main ingredients being alum and ammonium alum. Medical proof shows that alum contains aluminum. Using chemical baking powder, especially baking powder containing alum, can easily cause Alzheimer's disease, osteoporosis, cardiovascular disease, etc., and is harmful to the human body. If you want to buy baking powder now, be sure to Pay attention to whether it is "aluminum-free baking powder" (named on the product label); therefore, it is recommended that you use alkaline baking powder, which will be harmless to the body