The main component of this product is NMN, which is a natural substance in human body and exists in breast milk and some natural foods (such as broccoli, Chinese cabbage, avocado, beef, etc.). ). It has the functions of anti-aging, high-efficiency anti-fatigue and improving appreciation ability. I bought it many times, and now I feel the change is: my skin is better, my energy is more than before, and I have lost four or five pounds.