there are other threads on ET discussing diets, calories, protein/carb/fat ratios, etc. i think WHAT you eat is HUGELY misunderstood/overlooked. here are some good links: http://foodsupplements.homestead.com/vitamins.html http://foodsupplements.homestead.com/minerals.html http://foodsupplements.homestead.com/aminoacids.html imo, it is very interesting to look at your multivitamin ingredients and then check to see what each one does. i also did this for my protein powder bottles, since they list the amino acids contained. it is no secret many people's diets are TERRIBLE. not only are most people's calories way off, so are their protein/carb/fat ratios, and WHAT substances they eat. combine that all together and most people's eating habits are WAY out of whack! look at the ingredients of some of the foods you eat. many times there are like 50 weird chemicals in them. ARE YOU GOING TO TELL ME WE FULLY KNOW 100% WHAT ALL THAT STUFF DOES TO YOUR BODY?! NO WAY!!!! axeman's cave man diet (only eating stuff in the form it comes out of the ground) is on the right track, imo. as he pointed out, our digestive systems did NOT evolve (yes, we evolved) to eat like we do today. i think proper calories, protein/carb/fat ratios, cave man diet, and sufficient vitamins, minerals, and amino acids is THE WAY TO GO.