I took Elysium’s Basis supplement for a month but didn’t notice a dramatic effect. Basis is a supplement, a combination if pterostilbene and nicotinamide riboside. I switched to a cheaper combination of generic pterostilbene and niacinamide. After two months, I think maybe there’s a small effect? I have very strange dreams if I take it before bed. I take it in the morning instead and maybe I feel a little more energetic.
Pterostilbene is the methylated version ofresveratrol. Resveratrol is derived from red wine. Pterostilbene is found in blueberries. It’s the subject of a lot of study for its antioxidant and supposed anti-aging properties. The methylations may make it easier to absorb.

I can’t vouch that it works, but the Basis brand combination has some strong scientific support. Several Nobel prize winners are on their scientific board of advisors. Their hypothesis is that NAD+ declines with age and that these two components might increase production of NAD+.
The supplement industry is largely marketing and deception. On the other hand, it would be hard to organize a proper clinical trial. If this company can follow the effects of their unregulated supplement product on their customers, it might give enough data to justify a proper trial. I wish them luck, but I’ll go with the generic product, given the price.