Hello, i'm 14 and been on this whole weight lifting scene for about 2 months. My friend who is 16 wants me to take cell-tech with him. I was told at school by teachers that it hasn't been tested, and might not be safe. My question is if it is safe, and what is the proof of either side? Could someone please email me with their response? My email is clownzzzzz@aol.com. Thanks!