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Supplements > Androstenedione
The following information is about Androstenedione.
Androstenedione Defined
A weak androgenic steroid secreted by the adrenal cortex, testes, and ovary. In normal males less than 5% of their testosterone comes from the conversion of adrenal androstenedione. Androstenedione is converted to testosterone by the enzyme 17-ketoreductase. Androstenedione and testosterone are converted to estrone and estradiol in peripheral tissues (primarily in adipose tissue but also in muscle, kidney, liver and the hypothalamus) by aromatase. The conversion of androstenedione and testosterone accounts for more than 75% of the estrogens in the plasma of normal men. The rest is synthesized in the testes. Gonadotropin secretion may be partially controlled by estrogen formation in the hypothalamus.
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Off-site Androstenedione Links, User Submitted
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Mon Jun 29
- The Discovered Hazards of Pro Hormones that Led to their Restriction for Bodybuilding: Pro hormones have been listed as dietary supplements by the FDA because their makers claim that they do not contain ingredients found in anabolic steroids. They are the so-called noandro pro hormones bodybuilding supplements which are being marketed, and branded as forerunners of testosterone, the male hormone functioning as muscle builder.
Tue Oct 7
- JAMA -- Oral Androstenedion e Administration and Serum Testosterone Concentrations in Young Men, February 9, 2000, Leder et al. 283 (6): 779: You will need to login with your library barcode to access this full journal article. (Empirical Study)
- Research Shows Androstenedion e Can Raise Testosterone Levels - MGH, February 2000: Harvard Medical School Affiliate Massachusetts General Hospital (Androstenedio ne)
Wed Sep 3
- andro: Ironpower Australia manufactures a range of bodybuilding supplements including herbal AndroGel and AndroStack for naturally boosting testosterone. These legal steroids are made from herbs which contain prohormones that help build muscle and burn body fat when used in conjunction with hard physical exercise.
Thu Nov 8
- Testosterone precursors: use and abuse in pediatri...[Pe diatr Clin North Am. 2007] - PubMed Result: use of androstenedion e, dehydroepiandr osterone and androstenediol as testosterone precursors: no increase in lean muscle bulk.
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