Whould taking testosterone hlep me build muscle?

Maybe. Dr. Cheng is absolutely correct. Taking testosterone but not doing anything else will not build muscle. But a fascinating study published 2 months ago demonstrated larger doses of testosterone lead to greater muscle mass, assuming one ate properly & exercised regularly. Check out my thoughts on this study at http://alvinblin.Blogspot.Com/2012/03/testosterone-avodart-dutasteride-vs-fat_19.Html.
No. Building muscle requires resistance (weight) training, not testosterone. Supplementing with testosterone when levels are normal increase one's risk for prostate cancer.