When you have dystonia, which is often associated with Parkinson's, Dr. Oz says lubricating cells in the brain get knocked off track. "Once it happens, then you begin to tilt over," he says. "Then, it sort of falls upon itself because now you're a Leaning Tower of Pisa. Those muscles are overstrengthened and start to pull you down. ... It twists your body so your bones begin to change their shape. So if you're going to act on it, you have to be proactive early on."