What is NAD+? Is the old K product containing this ingredient particularly expensive?

What is NAD+? In fact, it is what the skin care industry now calls a "lady-class anti-aging ingredient". In fact, the price is not expensive. For example, Swisse's poetry plus NAD+ cell rejuvenation bottle is only a few hundred pieces, which is much more cost-effective than thousands of medical beauty and much safer. The key point is that the patented NR component can be really absorbed by the human body to improve the level of NAD+ in the body, and NAD+ is an important factor involved in metabolism and energy synthesis. Advanced oral medicine may be heard by every girl, but the benefits can only be realized by those who insist.