Functional medicine practitioner Mark Hyman, M.D., dedicates his new book, The Pegan Diet: 21 Practical Principles for Reclaiming Your Health in a Nutritionally Confusing World, to “the confused eater committed to better human and planetary health.” We are all probably a bit confused about what to eat to stay healthy these days. Nutritional advice is, at best, conflicting, and at worst, confusing. Dr. Hyman attempts to cut through the clutter with his “un-diet—a simple set of principles blending science and common sense into guidelines promoting health, weight loss, and longevity that can easily be adapted to any philosophical or cultural preferences.” […]