I TAKE THIS: First Human Clinical Trial For Nicotinamide Riboside. “In the first controlled clinical trial of nicotinamide riboside (NR), a newly discovered form of Vitamin B3, researchers have shown that the compound is safe for humans and increases levels of a cell metabolite called NAD+ that is critical for cellular energy production and protection against stress and DNA damage. Levels of NAD+ (first discovered by biochemists in 1906) diminish with age, and it has been suggested that loss of this metabolite may play a role in age-related health decline.”

I take the Niagen brand. I do seem to feel better and have more energy. There’s some evidence that combining it with pterostilbene may help, so I take a pterostilbene/resveratrol blend called PteroMax.