Have the medical and consumer communities ignored nutrition to the detriment of our health?

I fully believe that medical science has done a significant amount to extend our lives and make us healthier when dealing with specific illnesses. I don’t have the same faith when it comes to the consumer culture. However, after looking into some of the information, including the increase in U.S. obesity, the reaction against supplements (from the medical community including specifically the FDA), and the dismissal of raw food movements, it seems that both communities have contributed in a detrimental fashion to our health generally.

What do people think? Specifically, for members of the medical community, particularly M.D.s, how much training in nutrition have you received, and what trials related to vitamins did you study? Is this a public image issue only, or is there real science against vitamin therapy?