Hi.. a senior seeking to LIVE FOREVER (kidding of course,) but I heard of N.A.D., (Nicotinimide Adenine Dinucleotide,) and heard about some life enhancing effects it has! Some Mice, that dirty word, and worms, have had their lives extended through its use! If Worms and Humans share about 95% of their D.N.A., then it might have similar effects on Humans! Might be worth giving it a try, especially since old-timers don t have much to lose! What do you think? Thanks Tom... Oh yes, I exercise daily, don t smoke, don t drink, somewhat heavy for my height, 5 7 or so, and am a pretty healthy Veteran who has bi-yearly check-ups...TWA....