>>4557094 (last)

What's really funny is that NAD, the recent anti-aging flavor of the month announced I think by NIH, does what sounds like the opposite, helping aged cells to work full-on rather than being in semi-sleep mode.

So what NIH is pushing might make you feel great until suddenly you look like you're 120, all your cells burnt out but not regenerating. This is speculative; I don't know of any clinical results on NAD.