Bump to BS on the lying thing. If you get caught and you lied to her then not only will she be pissed that you are using steroids, but you may also lose her trust. Trust is one of the most important things in a relationship.
On the other hand all that bla, bla, bla that she is spewing about side effects, we have all heard all that shit a thousand times.
And I have to give another huge Bump to BS. Learn from the mistakes of others. It sounds mean, but hell, why not.
And I'll give another bump to BS, just for the hell of it cuz the guy just makes sense!