Nielsen//NetRatings ranked top health, fitness and nutrition sites. The demographics of such sites is 57% female and 43% male. 47.7% of the users are between 45 and 55 years old. eBay, WebMD and AOL own the top properties for online health and fitness.
Top Online Health, Fitness &
|US National Institutes of Health||479||0.45|
|About.com Health and Fitness||415||0.39|