Calories Don’t Count

Dr. Herman Taller was arguably ahead of his time with his assertion that a high-protein diet was more effective for weight loss than simply restricting calories. However, it was his promotion of "CDC" (Calories Don't Count) capsules that got him into trouble. He claimed that these capsules not only would help with weight loss but would also lower cholesterol, treat heartburn, improve the complexion, increase resistance to colds, and boost the sex drive. The FDA disagreed, noting that the capsules primarily contained safflower oil. Taller was eventually convicted of mail fraud.

More info: Wikipedia, Quackwatch