. . . . "MayoClinic.com offers intuitive, easy-to-use tools such as Symptom Checker and First-Aid Guide for fast answers about health conditions ranging from common to complex; as well as an A-Z library of more than 850 diseases and conditions, in-depth sections on 24 common diseases and conditions, 16 healthy living areas including food and nutrition, recipes, fitness and weight control, videos, anima" .