Product Name: 19-Nor-4-androstene-3,17-dione
|Synonyms: Estrenone; estr-4-ene-3,17-dione; (8xi,9xi,10xi,14xi)-estr-4-ene-3,17-dione; Estr-4-ene-3,17-dione; (8R,9S,10R,13S,14S)-13-methyl-1,2,6,7,8,9,10,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthrene-3,17-dione; (8R,9S,10R,13S,14S)-13-methyl-1,2,6,7,8,9,10,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthrene-3,17-quinone;
Molecular Weight: 272.382
Molecular Formula: C18H24O2
Boiling Point(ºC): 433.408°C at 760 mmHg
Flash Point(ºC): 161.831°C
Boiling point :433.408°C at 760 mmHg
Refractive index :1.556
Flash point :161.831°C
Vapour Pressur :0mmHg at 25°C
In vivo experiments in castrated rats demonstrated that subcutaneous treatment with Estr-4-ene-3,17-dione resulted only in a stimulation of the weight of the levator ani muscle, while the prostate and seminal vesicle weights remained completely unaffected. In contrast to its metabolite highly selectively stimulates the growth of the skeletal muscles but has only weak androgenic properties.
Does D--H--E--A help build muscle?
In early studies using men between the ages of 20-25, supplementation with D--H--E--A did not significantly increase testo levels, although it did help decrease body fat and increase lean bodyweight. However, when this study was later duplicated, no significant changes in body composition of test subjects were observed.
Other studies have shown D--H--E--A to cause an increase in I--G--F-I, an important growth promoter in muscles, yet no significant changes in lean body mass were observed along with the elevated levels of I--G--F-1.
Other studies have yielded inconclusive results, with no statistically significant increases in lean body mass, strength, or testo levels found in randomized placebo-controlled trials
What are prohormones?
Prohormones are essentially pre-cursors to hormones, or metabolic intermediates formed in the production of hormones. The prohormones of interest to athletes or bodybuilders are precursors to testo and estrogen.
The rationale behind taking these supplements, is that by increasing the levels of the pre-cursor, you increase your levels of testo. Testo is the primary male hormone responsible for building and maintaining muscle tissue, as well as producing masculinizing effects.
Common ingredients in Prohormone supplements:
In the past, there were two main ingredients used in prohormone formulas, D--H--E--A and Andro--stenedione (usually just referred to as Andro). They are both naturally occurring hormones in the body and precursors to testo and estrogen.
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