Favorite health iphone app or social network My Chart Epic Systems Corp. It is an app that allows me to login to my doctor's office from anywhere. I can check my recent bloodtests, send and recieve messages to the doctor, book appointments, keep track of the medications I'm on and have access on the go.
WebMD is another favorite of mine, you can look up symptoms, medications, information on medical conditions, it is a great all around health related app to have.
I am giving honorable mention to Twitter and Facebook, without them I wouldn't have the social connection. I should add Google+ I'm still figuring out how to use it.
Last but not least, the blogger app, I use it to write my blog! I can't leave it out of this list. Since a lot of the things I write on here are health related I believe it counts.