I don't normally post research articles that require people to look up words, terms and chemicals. This is an interesting one, however, currently running on the LEF News. Apparently, healthy life extension benefits similar to those offered by calorie restriction have been observed in rats fed a diet that is light in some amino acids. It'll take a while for this to percolate through the system and become something that you or I could practice. Nonetheless, it is very interesting indeed. Kudos to the researchers!