To be exact, it is in the morning, because through a night's rest, various systems and organs of the body have been rested and adjusted to varying degrees. After getting up early in the morning, the body is active because of nutritional supplements, and the metabolism is also accelerated. Good slimming effect can be achieved through exercise. In the evening, after a day's hard work and sedentary, there is less physical activity and more fat accumulation, so the evening is a maintenance process.