I'm assuming you mean Heroes.
I'd say yes, Heroes is teen-friendly. We don't let our almost 10 year old watch it, but we would let him if he was a few years older. It can get gorey in a few places, but it's tamer than most action/fantasy movies. It's definitely one I'd say needs to be watched from the beginning to get the history of characters and story line down. It can be confusing w/o it. There is a bit of sex in the first season because one of the characters is does online peep shows, and a couple of isolated scenes occasionally in the series with the same character, but it's pretty rare.
In a nutshell, it's about a group of humans who find, after a solar eclipse, that they have some extraordinary powers that they have to learn to deal with, and protect themselves from.