I have a high school degree and am the last person that should give advice so please do your own research. I just don't understand why anybody would spend money on Nicotinamide Riboside or NMN if it is going to get converted to Nicotinic Acid before being absorbed anyway. I guess the best reason is that the studies are using NR. I am cheap and I like things simple.
I can get 1000 500 mg Nicotinic Acid tablets for $25. amazon.com/gp/product/B003H...