This is a normal supplement. Let me give you an example. Multi-vitamin capsules are used to take fish oil capsules when fruits and vegetables are not enough. When there is no healthy fat intake, the nitrogen pump is used to temporarily improve the excitement. If you use it normally with the withdrawal cycle, you will be more prone to fatigue. Protein powder is usually extracted from milk whey protein. When protein doesn't eat enough, most meat contains creatine, which can improve muscle strength.

These supplements are often used, because normal people don't have enough time and money to eat so much nutrition except professional athletes, so they need supplements. This is not a medicine, but a supplementary substitute, which is no different from food in quantity.