Panthers quarterback Cam Newton says he has nothing to hide when it comes to testing for the human growth hormone.

The same goes for two of his top targets in the passing game — Carolina wide receiver Steve Smith and tight end Greg Olsen.

All three players say they're in favor of the NFL working out an agreement with the players union on a reliable HGH test, providing it's not too intrusive. Earlier this week the two sides discussed appropriate procedures to test NFL players for supplemental HGH, which is a banned substance but difficult to detect.

Newton says having blood drawn is "not a big deal."

He says "whatever the NFL decides to do I'm all for it, whether HGH testing or any testing, I'll be prepared."