Bryan, can I ask what your NR and Nam intake levels are at present?
I noticed a significant bump in energy when I first started NR, but it soon subsided. And discontinuing for 2 weeks didn't seem to have a perceptible effect. (Nor was there a perceptible rebound when I started up again.)
Niacinamide, on the other hand, still has a powerful effect on my sleep (even at just 500 mg). And Niacinamide + Glycine is the best sleeping potion I've ever discovered. (I've been vegetarian for decades, so a Glycine deficiency is not improbable.)
With NR I use 1,000 mg per day spread evenly across the daylight hours. I take 2,000 mg of Nicotinamide at the end of the day before bed and can get to sleep usually within 10 minutes.
You bring up an important point about Glycine and its funny it doesn't have this effect on me in the morning but your point is well taken.
NR sure does sound like a total bust. From my own experience to what people here write, no one has gotten even a little of the effect that Sinclair got in mice when injecting NMN. Meanwhile the manufacturer keeps ripping everyone off and people keep buying another useless supplement. Seems like another useless overpriced supp.
Yeah. Seemed like it had promise, though, didn't it? These reports that "are all over the place" sound a lot like placebo.
You know, I read "Reason"'s posts here and at the Fight Aging site, and he's really a broken record when it comes metabolism. To all these supplements introduced and marketed and trailed on us here by these businessmen posing as scientists, is that what's up here... Attempting to understand human metabolism, Reason and de Gray and so many others keep insisting, and then tampering with metabolism through the use of unstudied, unregulated supplements is really a waste of time, money, hope.
NR seems like another dud in a very long list of other supplements that are probably equally useless. Live and learn...