[letharion]

http://dietdoctor.com/ is my primary source of information on both nutrition and health. zaptheimpaler makes a good point to listen to your own body. Some years ago, I wasn't, and I felt like crap a lot of the time, with something that sounds a lot like IBS.

I switched my diet over to something more closely to what diet doctor advocates, and have gotten slighly more strict with every year, becauase I _feel_ a little better. To me, the "proof" that the information is accurate is that I feel good.

I have the impression, though this may be dated information, that a lot of science on the topic has been primarily focused on measuring the number of calories in/out, because that's easy to measure. When you try to measure _quality_ of your calories, everything becomes magnitudes more complicated to prove, so there's far less reliable science on the topic.