Everybody, including Oprah is speaking about the Hoodia diet plan pill! In fact ABC, 60 Minutes, and the BBC have virtually all done posts on the Hoodia diet pill. But why is everybody talking about the Hoodia diet plan pill? Just what does the Hoodia diet pill do? When taken roughly one hour in advance of a meal, the Hoodia diet pill functions as an appetite suppressant. It activates the brain into believing the body has sufficient power and thus does not need to eat.