The idea of steroids having direct fat burning properties is a commonly held belief among steroid users. This is why bodybuilders use steroids also during dieting, so they can maintain more muscle and lose more fat. How does anabolic steroids help burn fat, is it direct or indirect and what type of fat. I’ll help try to answer these questions.
Steroid fat loss studies
Unfortunately, most of the studies on fat loss and steroids is done on cattle. It’s a pretty scientific way of looking at it since it’s a controlled environment and they don’t do anything unique that might alter results.
In a study published in J Anim Sci. 2007 Feb;85(2):430-40 they measured carcasses of steers and cattle after they had been implanted with Synovex-Plus (SP), which is testosterone. This study shows that anabolic implants do not appear to have direct effects on intra-muscular lipid deposition. In other words implanting did not change the bodyfat percentage of visceral fat, the fat inside or around the muscles.
Another study J Anim Sci. 1999 May;77(5):1100-4 used implanted steroids trenbolone acetate plus estradiol benzoate ot progesterone at various times and dosages over 2 months. They found no significant differences on intramuscular lipid content.
Notice in those studies that they are talking about intramuscular fat. Its been theorized by many that steroids do a bad job of stopping intramuscular or “visceral fat”. However, they do seem to help promote fat loss overall. This is done by losing fat subcutaneously, which is the fat under the skin, which you can visually see.
A study published in J Anim Sci. 1996 Aug;74(8):1770-6. compared control cattle to three other groups; those implanted with trenbalone acetate, implanted with testosterone propionate +20 mg of estradiol benzoate, or both implants. This study found that groups all gained weight and lost fat(were leaner cows). Interesting enough they found the cows that had been implanted with 200 mg trenbolone acetate only, were the leanest.