Dr. David Agus wages it in his new book The End of Illness. Brian Bethune summarizes:
Vitamin supplements would be bad enough if they were merely useless, he says. The money Americans spend yearly on vitamins—some $25 billion—is sorely needed elsewhere in the medical system. They aren’t getting much for their money now. Consider claims that vitamin D significantly cuts cancer risks and that three-quarters of the U.S. population had insufficient levels of it. For Agus, these results are found in not very high-grade studies; for one thing, he’s at a loss to understand how anyone can claim to have established the correct dose for appropriate D levels. The bone disease rickets is long gone and age-related fractures are not on the rise, meaning that by the only indications we have, the population has quite enough vitamin D.
Gregory Ferenstein details Agus' other prescriptions:
[W]e combat weight loss by driving to the gym to walk on a treadmill–and then return to hunch over laptops for hours on end. "Sitting at your desk is akin to smoking a cigarette," he says. Prolonged sitting, independent of physical exercise, he writes, "has been shown to have significant metabolic consequences," influencing everything from cholesterol levels to blood sugar.
The Dish 