Worry about cholesterol. Avoid red meat. Eat whole grains. Could it all be a lie? We live in an era of health hype and nutrition propaganda, and we are suffering for it. Decades of avoiding egg yolks, choosing margarine over butter, and replacing the real foods of our ancestors with low-fat, processed, packaged substitutes have left us with an obesity epidemic, ever-rising rates of chronic disease, and, above all, total confusion about what to eat and why.