Health is an ideology: a set of ideas that establishes goals, creates expectations, and determines our actions. An ideology provides a way to understand the world and ourselves. It’s only natural that we want to exert control over our health, our susceptibility to illness, the length of our lives. Our anxiety about health – amplified by constant discussion in all available media – makes us vulnerable to the latest promise of the rewards of a healthy lifestyle. The obsessive pursuit of health, however, is itself unhealthy.