Parabolan is trenbolone cyclohexylmethylcarbonate. The half-life of a steroid ester is mostly dependent on its ratio of fat solubility to water solubility: the longer chain the ester, the higher this ratio, and the longer the half-life. This particular carbonate could be most closely compared with an enanthate ester; the half-life is probably a little less than week.
An amp (76 mg trenbolone cyclohexylmethylcarbonate) of Parabolan is comparable only to 58 mg of trenbolone acetate. (The acetate is a little more potent, more effective per milligram, because the acetate ester is lighter and therefore a higher percentage of the weight is trenbolone.)
The properties of Parabolan are the same as trenbolone acetate (Finaject) except for longer half life. While Finaject itself is no longer available, in some cases injectable preparations from Finaplix have been made. The substance is the same: trenbolone acetate.
There is no evidence in the literature, nor I think practical evidence, that trenbolone has a “special role” in burning fat. Rather, it is an extraordinarily potent steroid, being about three times as effective per milligram as testosterone esters. For this reason, any property which anabolic steroids have, trenbolone will demonstrate more strongly per milligram.
I have found no indication in the scientific literature of particular kidney toxicity with trenbolone. I know of a number of users, at doses of typically 50 mg/day, who have experienced no problems. There are however anecdotal claims of kidney problems. It seems to me, however, that this is occurring only with athletes stacking an incredible amount of drugs, and how the blame can fairly be laid at trenbolone (actually at Parabolan, not trenbolone acetate) is not clear.
It is also not clear that trenbolone results in any greater degree of increased aggression for a given amount of anabolic effect than testosterone itself does. However, on a per milligram basis, it undoubtedly does. The substance does not cause uncontrollable “roid rage” despite the hype to that effect often seen.
About the author
Bill Roberts is an internationally-recognized expert on anabolic steroids and performance-enhancing drugs (PEDs). He received a bachelor degree in Microbiology and Cell Science and completed the educational and research requirements for a PhD in Medicinal Chemistry at a major American university.
Bill entered the nutritional supplement industry prior to completing his doctoral thesis but his education was invaluable so far as being able to design/improve nutritional supplement compounds, since it was in the field of designing drug molecules and secondarily some work in transdermal delivery.
His education was not specifically "geared" toward anabolic steroids other than expertise with pharmacological principles having broad applications. This has allowed Bill to provide unique insight into the field of anabolic pharmacology with knowledge of points which he would not have known otherwise.