I've seen some bad press about 5-AD. I think brock strasser made some valid points about it.
Brock Strasser 2001-09-02 22:54:01
It is absolute crap!!! And it is estrogenic as hell. 5-AD sucks. I have 4 references that correlate high 5-AD levels to pseudohermaphroditism in men. Plus, the pentyl ether technology is a waste and just a slick gimmick, Bill and I investigated this over a year ago and we dropped it. This guys stole the idea from us. Read these studies and see how the maker of this shit lies like a rug. 5-AD sucks. It is marginally anabolic, hardly converts to testosterone and is totally estrogenic. See below:
Cancer Res 1982 Nov;42(11):4797-4800 Related Articles, Books, Effects of aminoglutethimide on delta 5-androstenediol metabolism in postmenopausal women with breast cancer. Bird CE, Masters V, Sterns EE, Clark AF.
delta-5-Androstene-3 beta, 17 beta-diol has potential estrogenic activity because it is known to bind to receptors and translocate to the nucleus of certain estrogen target tissues. We studied delta 5-androstene-3 beta, 17 beta-diol metabolism in postmenopausal women with breast cancer before and during aminoglutethimide-plus-hydrocortisone therapy, utilizing the constant infusion technique. The metabolic clearance rate for five subjects was 799 +/- 89 liters/24 hr (470 +/- 47 liters/24 hr/sq m) before and 751 +/- 93 liters/24 hr (444 +/- 57 liters/24 hr/sq m) during therapy. Plasma delta 5-androstene-3 beta, 17 beta-diol and delta 5-androstene-3 beta, 17 beta-diol free index decreased despite absence of change in the metabolic clearance rate. Increased dehydroepiandrosterone/delta 5-androstene-3 beta, 17 beta-diol conversion ratios in individual patients suggested an increase in 17 beta-hydroxysteroid dehydrogenase activity during therapy. There were no alterations in the formation of the estrogen precursors testosterone and delta 4-androstene-3,17-dione.
5-AD stimulates the growth of estrogen dependent breast cancers!!!
Ann Endocrinol (Paris) 1979;40(6):547-548 Related Articles, Books [In vitro studies of testicular biosynthesis in 4 cases of male pseudohermaphrodism (MPH) due to testicular 17 ketoreductase defect (author's transl)]. [Article in French] de Peretti E, Cadillon E, Bertrand J. In 3 cases of MPH due to 17-ketosteroid reductase defect, the pattern of testicular biosynthesis studied after incubating homogenates of testicular tissue with 14C-Progesterone and 3H-Pregnenolone was very similar. The most striking finding was the excessive production of delta 4-Androstenedione contrasting with the small amount of testosterone formed. Conversion of DHA to delta 5-Androstenediol was also limited. In addition, 3 pairs of substrates, namely 14C-testosterone and 3H-delta 4-androstenedione; 14C-estradiol and 3H-estrone; 14C-delta 5-androstenediol and 3H-DHA, were incubated for various length of time. Homogenates of testicular tissue from 2 cases presenting with the biosynthetic defect were studied as to compare to testicular tissues from 2 subjects with normal testicular biosynthesis. Different degrees in the impairment of the reduction or the oxydation were observed for the different pairs of substrates in pathological as well as in normal tissues. This suggests that the extent of the enzyme defect would differ for the 3 pairs of substrates.
J Clin Endocrinol Metab 1992 Sep;75(3):773-778 Related Articles, Books, LinkOut
Mechanisms of androgen production in male pseudohermaphroditism due to 17 beta-hydroxysteroid dehydrogenase deficiency. Rosler A, Belanger A, Labrie F. Department of Endocrinology and Metabolism, Hebrew University-Hadassah Medical Center, Jerusalem, Israel. 17 beta-Hydroxysteroid dehydrogenase (17 beta HSD) deficiency is a rare cause of male pseudohermaphroditism, but is a frequent disorder among a highly inbred Arab population in the Gaza strip. Affected individuals are born and reared as females until puberty, when marked virilization occurs, leading in many cases to the spontaneous adoption of a male gender role. To investigate the mechanisms and site(s) of androgen production, we determined the gonadal and extragonadal steroid patterns in two postpubertal male pseudohermaphroditism patients, who were castrated and reared as females. Before castration, both patients had very high plasma levels of androstenedione (delta 4-A), normal or moderately low levels of testosterone (T), and significantly elevated delta 4-A/T ratios (P less than 0.01). Dihydrotestosterone (DHT) levels were normal or high, while the DHT/T ratios were lower than normal (P less than 0.01), suggesting enhanced 5 alpha-reductase activity. These abnormalities were much more severe in spermatic venous blood. 17 beta HSD deficiency was also found in the delta 5-pathway, by high dehydroepiandrosterone (DHEA) levels and very high dehydroxyepiandrosterone/delta 5-androstenediol (DHEA/delta 5-diol) ratios, and in peripheral tissue metabolites, by very high androsterone glucuronide/3 alpha-androstanediol glucuronide ratios (P less than 0.01). The estrogen pathway was also impaired (P less than 0.01), even though both estrone and estradiol levels were elevated. Gonadectomy significantly reduced all androgens and estrogens (P less than 0.01), but when compared to 42 castrated controls, both patients had lower delta 4-A and higher T levels. The delta 4-A/T ratio was lower than that in controls, indicating normal to enhanced extragonadal 17 beta HSD activity. A similar pattern was observed in the delta 5- and estrogen pathways. DHT levels were within normal limits, and 3 alpha-diol was moderately decreased. These data suggest that testicular 17 beta HSD activity is under a different genetic control from that in extragonadal tissues. Affected males lack the testicular enzyme, but their extragonadal 17 beta HSD activity is normal or enhanced. Together with enhanced 5 alpha-reductase activity, this represents a highly efficient compensatory mechanism for androgen and estrogen production after puberty.
5-AD is worse than a waste, it is counterproductive unless you are a transexual. - Brock