Science and Pseudoscience in Adult Nutrition Research and Practice
http://www.csicop.org/si/2009-03/spector.html

lots of bunk in science's 1st draft

"The data clearly show that much current advice about dietary pyramids, food supplements, megavitamins, and weight loss regimens is frequently unproven, erroneous, or even harmful and is often based on pseudoscience or derivative incorrect professorial opinion."