I wouldn't recommend steroids at all. At 125lbs you must have almost no base of muscle at all. How long have you been training and what does your diet look like? How tall are you?
You really need to build up a base before using steroids or you will just waste your time, money, and possibly hurt yourself.
You really need to build up a base before using steroids or you will just waste your time, money, and possibly hurt yourself.