T-3 can be used in both bulking and cutting programs but always in the presence of aas namely testosterone. Yes, T-3 will increase your metabolism and protein sythesis which translates into more lean muscle being gained and body fat lost if you are taking in calories right around your active metabolic rate.
T-3 is one of the drugs that I consider the "Fab Five"
Here is an exert of my new book "The Anabolic Gameplan":
THE FAB FIVE by Dino Strong
I believe there are five bodybuilding compounds that can be combined to make the most anabolic, muscle producing and fat burning cycle ever available. The fab five are growth factors that are produced naturally by the human body and therefore best recognized and accepted as hormones already present in the body. An abundance of natural hormones will cause growth without your body attempting to resist these hormones in any way. These five most beneficial body building compounds are Testosterone, Human Growth Hormone, Insulin Growth factor, Insulin, and Thyroid.
Their effects on your genetic makeup are the reasons the Fab five are the most indispensable bodybuilding compounds available. These five hormones can synergistically alter your natural genetic makeup to produce muscle gains and fat loss far beyond your genetic limitations. For example HGH and IGF-1 will cause you to produce entirely new muscle cells. Where anabolic steroids will make the muscle cells larger, HGH and IGF-1 will cause some muscle cells to split produce new and larger muscle cells. The creation of new muscle cells would not occur with a cycle consisting of solely anabolic steroids. This is a description of just one unique effect of the fab five. Let’s take a deeper look at the Fab Five and find out how to use them together to grow far beyond what nature ever intended.
Hope this info helps.
To view the sales letter for "The Anabolic Gameplan" and to purchase an advanced copy, please checkout:
http://www.elitefitness.com/reports/steroidcycles/