first blood, i can relate to the idea of the question, but i'm sure many a first time user has also asked that same question, but you're right. do research and find out about them, then make an informed decision. i had questions before i started trt, but through a lot of research, i found steroids weren't as dangerous as the media, doctors and such would have one believe.
yes, there are side effects, as with most everything you use on your body. even food has side effects, and each person is different to how their body reacts to what they put on or into it. also keep in mind overindulgence will increase side effects. you know the saying too much of a good thing can be bad. most ppl can take hcg, but it give me severe hives. so research a lot and be sure this is what you want. if you're young, i recommend not jumping the gun too fast.