The body needs to consume at least 250mg of NMN to effectively increase the NAD+ level. Many foods contain NMN, such as broccoli, avocado, tomatoes and other vegetables, but the content is very small. According to statistics, taking one capsule of 250mg NMN is equivalent to eating 36 kg of broccoli. This shows that it is very difficult to consume enough NMN needed by the body and convert it into NAD+ from daily diet. It is a more convenient and a more effective choice is to consume NMN from NMN supplements. Taking a person’s weight 60kg as an example, it is recommended that the person aged 40 or above to consume 500mg of NMN per day.