NAD supplements, including nicotinamide mononucleotide (NMN), are being touted as miracle cures to delay or even reverse the aging process. These pills are said to help prolong life, increase energy and improve the immune system. However, they have not been proven to work.

Nicotinamide mononucleotide is a precursor to nicotinamide adenine dinucleotide (NAD+), which is essential for a number of functions in the body. It is responsible for the repair of DNA damage and is required for cell growth.

NMN is also used in a number of cosmetic products in Europe. Several studies have shown that NMN can be taken in a number of doses without harmful side effects.

Researchers have found that NMN can be converted into NAD+ in the body. The increase in NAD+ allows cells to work more efficiently. Increased NAD+ levels can also improve vision.

Currently, scientists are researching the effects of NMN on the human body. Although NMN is considered safe, it may cause cancer if taken in excess. A small clinical trial in Japan has shown that NMN can be consumed in human dosages of up to 500 mg.

While NMN is thought to help alleviate some of the symptoms of aging, more research is needed to confirm the effectiveness. One study in mice found that NMN treatment improved metabolism and energy levels without causing visible side effects.

The researchers noted that increased concentrations of NAD+ improved insulin sensitivity and reduced the risk of diabetes. This could have positive implications for people who are at high risk of developing diabetes.