T2 appears to do this the similar to how l-carnitine helps with fat loss by supporting the amount of fat that enters the cell mitochondria. Once in the mitochondria, the fat is burned as energy. There is also some evidence that T2 may support increased growth hormone levels.
T2 a Fat Burner for Bulking? 3,5 Diiodo-L-Thyronine Wards Off Fat Gains & Doubles the Number of Hypertrophy-Prone Glycolytic Fast Twitch Muscle Fibers.
Effect of 3,5-diiodo-L-thyronine on thyroid stimulating hormone and ...
Effect of 3,5-diiodo-L-thyronine on thyroid stimulating hormone and growth hormone serum levels in hypothyroid rats.
Stoppani, Jim. "Summer muscles: get ripped just in time to show it off." Flex May 2012: 102.
T NATION | Thyroid Handbook
3,5-Diiodo-L-thyronine powerfully reduces adiposity in rats by ...