I regard this from a perceptual context. I eat fruit regularly, thus raised blood suger more often thus more raw material for nerves to react to quicker, thus more SENSING and feeling, better smell taste and touch or even awareness. Hope it don't sound too high horse like, but is the chemistry valid? When I eat bad I know about it better. If I lower metabolism with junk food then I am just less aware of the "indigestion". But the awareness of change in energy state is the indicator.. None the less I think there is truth in the digestive fire hypothesis. Perhaps our biochem changes and is more prepared for the next meal being alike... make any sense? J.C // The Vegan Bikers Home Page: http://www.nildram.co.uk/veganmc