Having read upon niacinamide's beneficial effects, I started taking it as a potential replacement for niacinamide riboside. Although research papers note that NAMPT (enzyme for converting niacinamide into a NAD intermediate) declines with age, I have been able to witness niacinamide's positive effects on my body (without going into details). I have also tried niacin, but flushing was annoying. I am 52, btw.
After 6 months of niacinamide administration (500 mg x 3 daily), I added 250 mg niacin 3 x daily. Surprisingly, I no longer get flushing from niacin. I also noticed a boost from taking niacin (in terms of my exercise performance).
Finally, I have added niacinamide riboside to the stack (250 mg x 2 daily). However, it seems that its effect is overshadowed by niacin and niacinamide - I can detect nothing. I am thinking that the salvage pathways interlink all three vitamin b3 substances, and thus, the combination of niacin and niacinamide is sufficient - rendering niacinamide riboside unnecessary. Unfortunately, of course, I have no way of objectively verifying this (e.g., tissue samples).
Has anyone else tried to use niacin and/or niacinamide as a cheap replacement for niacinamide riboside? If so, has anyone else found that niacinamide riboside does not add much?