What can be done from a user's point of view in order to know if something's wrong with the use of IGF ?

I mean,as a steroid user i know a simple blood test can show elevated liver values. So we take liver proterctants during use.
The same with estrogen,prostate values etc.There are substances that can make use safer.

So

1)what kind of side effects should alarm the user
2)what kind of exams can verify something's wrong
3)What kind of additional substances can we make use safer
or even reverse the side effects ?