Sport nutrition and supplement experts Kimberly Mueller and Josh Hingst provide concise descriptions for 120 of today’s most popular supplements in their book “The Athlete’s Guide to Sports Supplements.” For each entry, there is detailed information about what it is, how it works, potential performance benefits, research studies and outcomes, dosage recommendations, and possible health concerns. There are also recommendations for masters athletes, those competing in extreme environments, and those with special dietary needs, such as diabetics, vegetarians and people with food allergies.