[staunch]

I said it was weak :-) I'll admit I have nothing to cite and recall little beyond the basic concept. Could be total bull, but certainly makes sense to someone who doesn't know much about the science behind the idea.

My totally useless guess is that as a baby you'd need the most sleep, and around early 20's things would start reversing the other direction. That seems like a pattern in other body functions.

Anyone less ignorant have some real information?

[whacked_new]

While I'm not really less ignorant, it certainly doesn't look like bull :) But I think the age group is important, because I want to know how I compare with "young people." If "cell regeneration" refers to brain cells, then I'm old. If it refers to organ tissue cells or something, maybe I can call myself "young." Slim chance though, haha. My problem is that I get bad food comas unless I sleep something 9 hours a day; this is a long-term observation over many years. I don't know anybody at my age who sleeps 9 hours though.