Today's Health section at msnbc.com has a story reporting on Roy Walford's study of the effects of high-nutient, low-calories diets on the participants in Biosphere 2 over two years. It's obviously only a short term study, but the results he presents look excellent.
Max
http://www.maxmore.com
Philosophical issues of technology
President, Extropy Institute:
exi-info@extropy.org, http://www.extropy.org