Should we all go gluten-free? Is the Paleo Diet a surefire solution to weight loss? Are meat and dairy dangerous? With all the nutrition data flying around these days, it's a wonder we can ever decide what's for dinner. But amid the chaos of health facts and myths is the central truth that what you eat can make a major difference in the quality of your life.

To help you navigate through the confusing sound bites, nutritionist Jennifer Swallow, MS, RDN, LDN, serves up cold, hard facts-backed by scientific evidence and illustrated with personal experience-in her invaluable reference...