According to related reports, after the age of 25, people began to lose collagen in their skin. The older you get, the more you lose. At this time, they should pay attention to maintenance. Fitness and food supplement are the main maintenance methods. Sticking to physical exercise can keep your body energetic, make your skin firmer and strengthen your body. As for dietary supplements, you can choose appropriate collagen products to supplement them appropriately. At the same time, paying attention to diet, eating more fruits and vegetables, eating less greasy food and staying up late are all conducive to keeping the skin young.