After reading the most recent finding by David Sinclair (not a big fan of his) on nicotinamide mononucleotide I found studies that showed that nicotinamide ribsoside was converted into the former within the body and placed an ordered for some riboside.
On day 1 I took 125 mg and had a general feeling of well being but, I didn't think much of it. Of the 100+ supplements I have taken I have never had much of an effect from any of them. On day 2 I took 250 mg and that's when it happened. I felt like a god. I can only describe it as feeling younger, much younger. It wasn't a high or euphoric feeling, I just began to feel somehow cleaner, more energized, with greater focus, motivation and liveliness. On day 3 I took the same dose and continued to feel better than I remember feeling in years. Again, it didn't stimulate me like a nootropic or caffeine. It made me feel like I was 120% of the person I was before I began. It's a very strange feeling.
Then day 4 rolled around. I took the same dose, but hours later I crashed like a lead ballon. It felt like someone took a baseball bat to every muscle in my body. I was lightheaded, dizzy and extremely tired. I was completely incapacitated. The manufacturer had told me that light headedness and fatigue were the first signs of "reaching your limit". I went to bed early and by the next day I felt okay again. I stopped the supplements for a few days and then began again and stayed at a 125 mg. Eventually I had the same effects of coming up for a few days and then a had crash although much less than my previous one. I am going to try 125mg EOD now and see what happens.
It is clear to me that this supplement is the real deal. Somewhere on this site someone posted a few reviews from another site that showed similar results to mine. There was another user here who posted he had been on this supplement for months with zero noticeable results so it is either dose dependent or only affects some. The manufacturer recommends on the bottle to stop taking it after a month for several days which is a very odd statement for a supplement manufacturer and suggests that people are reporting my effects. Whether in the end this supplement is doing more harm than good (given the sides I have had) or in the end does anything at all to influence lifespan I of course can't say, but I am fairly convinced we are going to be hearing more interesting things about nicotinamide riboside and monoucleotide in the near future as Sinclair and company continue work on their studies.