NAD (Nicotinamide Riboside) levels are the one that can conclude the aging process in human body. They are higher in young people and boost the immunity, better health and better skin. It also helps in repairing cells in body. By the age NAD level starts declining and effects can be seen in low memory and other physical weaknesses.
NAD+ is a very important molecule, having a myriad of effects in our cells and enzymes that protect our DNA and it also help in repairing damaged DNA. You can increase the NAD levels naturally apart from using supplements too. You can exercise, eat healthy and do fasting to increase NAD levels naturally in your body.