"The science of nutrition is complex -- eating shouldn't be. It can be frustrating understanding the claims about superfoods. Do raspberry ketones really help you lose weight? Do blueberries really fight cancer? Are goji berries worth a try? You'll learn why the calcium in kale is absorbed as well as the calcium in milk. Lentils, chickpeas and beans are not just good for you; when cultivated, they also put important nutrients back into the soil. Goji, acai and noni berries may be more hype than substance. Xylitol, a sugar alcohol with a third fewer calories than sugar, could actually help prevent cavities and even ear infections. People who eat avocadoes tend to weigh less than those who don't. Beets might help you run faster -- and maybe even perform better in bed. The author discusses the latest research on the most popular superfoods and offers recommendations on how -- or if -- you should incorporate these foods into your diet. Jennifer Sygo is a registered dietitian and sports nutritionist for Cleveland Clinic Canada and the nutrition columnist for the National Post."