Nicotinamide riboside (NR) can be converted to NAD+ in muscle cells.

“for example it can't cross the brain at all it's fairly decent at getting into muscle if it's there there's not a lot there but what is there can get into the muscle”

“there's a little bit in the Catena my dri beside that makes it into the muscle intact that pulled up the graph to try to see the amount and they have to blow up that part of the bar graph to show you what that tiny trace looks like it's basically practically meaningless”

“Other people have published recently that nicotinamide riboside, this is a precursor for NAD, if that is given to mice, they also gain muscle mass or they maintain their muscle mass, and this nicotinamide riboside is converted to energy, and increased amount of energy is always better for any cell because that is the precursor to the energy currency of the cell, that's ATP.”

“So nicotenomide ribocide is not toxic. >> It's an NAD booster. So it's a direct precursor of NAD.”