When you start digging for information about the best way to eat to support athletic performance and lose body fat, it's easy to get confused by all the conflicting ideas you'll encounter. Most of us were raised to believe losing weight is as simple as calories in/calories out, or "eat less, exercise more". And it ain't necessarily so. Here's Greg Glassman giving an introductory lecture about the body's hormonal response to various macronutrients, and about how the food we eat has a direct impact on our long-term health.