He's looking at pro hormones here....not exactly overly strong ones but still enough to 'tamper' with his system. They're not some "no name, dodgy herbal supp" that doesn't work.
I agree with Woody depending on how old you are and how much experience you have under your belt. If you're young and have only just started lifting, you shouldn't be looking at these kinds of things yet....eat more, train hard and you will grow.
If you've been training for 5+ years, you can still pack on a few kgs of lean mass with a 2 month Andro cycle...but do the research. Weigh up the pros and cons, possible side effects etc.