Yeah it is amazing stuff but it's not magic however, if you don't train hard and eat properly you are putting it to waste. There are also some roids that are more harmful than others. Testosterone when administered properly isn't harmful, you're body makes it anyways, the problem comes in with those that abuse it. I could safely inject up to 300 mg a week. If proper post cycle therepy is in place ie antiestrogens and natural test boosters you should be fine. The problem most have is that they inject <1 gram a week and then jump off the cycle and expect everything to be peachy. The problem with that is your natural test has been dormant for a while and not producing while your estrogen is through the roof due to your body's homeostasis trying to keep up with your new found surge of test. The synthetic stuff such as Tren, Winny, Dbol and Deca can cause havok unless your very careful and pay close attention to your body. I am nin no way advocating the stuff, I don't do that !@#$ anymore, just spreading some knowledge.