Who Switched Off My Brain? Controlling Toxic Thoughts and Emotions by Dr. Caroline Leaf - We're living in an epidemic of toxic emotions. Research shows that as much as 87% to 95% of mental and physical illnesses are a direct result of toxic thinking-proof that our thoughts affect us physically and emotionally. In this best-selling book, Dr. Caroline Leaf clearly communicates 13 ways to detox your thought life and live a life of physical, mental, and emotional wholeness.