Yes, I have heard of it - but I have never done it..... but I am sure that it is like all the others: example - eat for your right body style, eat for your sex, eat based on your body size, eat for your medical problems / issues.

IMO - one just needs to eat correctly, drink plenty of water (6-8 cups per day) and exercise three times a week and they will be healthy.... walking for 30 minutes constitutes being an exercise.