The first step of fat burning is hydrolysis, and glycerol and fatty acids can be used by the body first. Hydrolysis of course needs water, so all the weight-loss methods on the market don't allow drinking water, which is totally nonsense. Although the water in our body is not enough for fat hydrolysis, at least, it is good for burning fat to ensure that we drink enough 1500-2000ml of water every day. After fat is decomposed into glycerol and fatty acids, the second step is to transport it to muscles to provide fuel for muscle exercise. Fat decomposition is carried out in adipose tissue, that is, in our fat. Fatty acid transfer between fat meat and muscle depends on blood circulation.

Fatty acids can only be burned if they are transported to muscles through blood circulation. If it can't be transported, it won't burn if it is decomposed. Some people will ask. Where are these things if they don't burn? After fat is decomposed into glycerol and fatty acids, it will become triglycerides if it is not burned. This process is called esterification of fatty acids. In our adipose tissue, triglycerides are constantly decomposed and re-esterified, which is called triglyceride-fatty acid cycle. In other words, people's fat decomposition ability is very strong, but it is often decomposed, and the body does not need so much. Finally, some of them got fat again. Generally speaking, in a quiet state, only 30% of fatty acids decomposed from fat are used for combustion, and 70% are re-esterified into fat.