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Topic: Androstenedione

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	Androstenedione - Wikipedia, the free encyclopedia
		Androstenedione (also known as 4-androstenedione) is a 19-carbon steroid hormone produced in the adrenal glands and the gonads as an intermediate step in the biochemical pathway that produces the androgen testosterone and the estrogens estrone and estradiol.
		Some androstenedione is also secreted into the plasma, and may be converted in peripheral tissues to testosterone and estrogens.
		Androstenedione originates either from the conversion of dehydroepiandrosterone or from 17-hydroxyprogesterone.
	en.wikipedia.org /wiki/Androstenedione (356 words)

	Androstenedione
		Androstenedione, a steroid hormone, is a natural substance made in the adrenal gland and the gonads.
		Androstenedione is synthesized in the adrenal gland and gonads from dehydroepiandrosterone.
		Androstenedione is distributed to various tissues of the body and is metabolized to testosterone and estrone.
	www.pdrhealth.com /drug_info/nmdrugprofiles/nutsupdrugs/and_0022.shtml (1083 words)

	Androstenedione (Site not responding. Last check: 2007-10-21)
		Androstenedione is a steroid hormone produced in the adrenal glands and ovaries.
		Androstenedione ("andro") is manufactured as a dietary supplement and marketed as a natural alternative to anabolic steroids, claiming to enhance sports performance and increases muscle mass.
		Children and adolescents are particularly vulnerable to irreversible effects of Androstenedione, including androgenic and estrogenic effects as witnessed in adults, early onset of puberty, and premature cessation of growth resulting in short stature as adults.
	www.supplementnews.org /androstenedione (435 words)

	Androstenedione
		Androstenedione is currently used as a nutritional supplement to grow bigger muscles and stronger bones.
		Androstenedione have also claimed to be effective in improving mood and energy levels.
		Androstenedione, a popular supplement taken to enhance athletic performance, did not enhance muscle-building or increase testosterone in the blood but appeared to produce adverse health effects in a small study of young men, according to an article in a recent issue of The Journal of the American Medical Association (JAMA).
	www.usgyms.net /andro.htm (1176 words)

	Androstenedione - Supplements
		Androstenedione is a "pre-hormone," meaning that it is an inactive precursor of another hormone — in this case, a precursor of both female (estrogen) hormones and male (testosterone) hormones.
		Following 8 weeks of androstenedione consumption there were no differences between the placebo and androstenedione groups in terms of muscle strength, lean body mass or fat mass.
		In the androstenedione group, however, blood levels of high-density lipoprotein (HDL) cholesterol (the “good” kind) was reduced after 2 weeks and remained low after 5 and 8 weeks of training and supplementation.
	www.supplementwatch.com /suplib/supplement.asp?DocId=1017 (907 words)

	Food and Nutrition: Choices for Health > A Guide to Dietary Supplements > Androstenedione
		Androstenedione is a steroid hormone that is the precursor to testosterone, the steroid hormone associated with masculinity.
		Androstenedione is produced by the adrenal glands and the gonads and is converted into either testosterone or estrogen within the blood.
		Supplementation with androstenedione, the immediate precursor to testosterone, is believed to elevate blood testosterone levels in both males and females and thus increase muscle mass and physical strength.
	www.extension.iastate.edu /nutrition/supplements/androstenedione.php (408 words)

	Health Effects of Androstenedione
		Androstenedione and related molecules, if given in sufficient quantities and for sufficient duration, are likely to cause androgenic (and thus anabolic) or estrogenic effects in humans.
		In particular, androstenedione and related molecules consumed in sufficient quantities to have any anabolic effects will confer androgenic and estrogenic risks, although risks may also be present with consumption that is not sufficient to produce obvious anabolic effects.
		Androstenedione ("andro") and its derivatives, including androstenediol, norandrostenedione, norandrostenediol, are believed to possess little intrinsic activity as hormones, but andro and its derivatives can be readily converted to active androgens (male hormones, possessing anabolic activity) and estrogens (female hormones).
	www.fda.gov /oc/whitepapers/andro.html (1689 words)

	Creatine and Androstenedione
		Androstenedione is a precursor molecule to testosterone, which means it is a step along the biological chain that produces testosterone.
		For this reason, sellers of androstenedione claim there is no danger of getting too much testosterone and experiencing the side effects of anabolic steroids, which include loss of hair, outbreaks of acne on the body, and impotence, to name a few.
		Androstenedione, on the other hand, has not shown the effective results of creatine, and the risk of increasing the body’s level of testosterone has caused many to write it off as a legal steroid.
	zine375.eserver.org /swallow.html (1497 words)

	Nutritional Supplement Facts for Androstenedione
		Androstenedione is an androgenic hormone produced naturally in men and women that's converted by the liver into testosterone.
		The ideal intake of androstenedione has not yet been determined, but in research, oral doses given to men at levels of 50 mg and 100 mg per day were shown to raise testosterone levels from 140% to 183% and 211% to 237%, respectively.
		Androstenedione is often used with DHEA and Tribulus terrestris to enhance the benefits of each.
	www.nutros.com /nsr-0201i.html (1607 words)

	Androstenedione - A steroid by any other name is still a steroid
		Androstenedione is a naturally occurring androgenic steroid that is produced by the adrenal glands, ovaries, and testicles.
		Exogenously administered androstenedione only has a short half-life; East German athletes snorted it as a nose spray an hour before competition (this was a team requirement in the 1988 Olympics).
		However, since androstenedione is an androgenic steroid, it is very likely that we will discover that it is harmful.
	www.rice.edu /~jenky/sports/andro.html (704 words)

	Bodybuilding.com - Wayne Mercer - About Androstenedione!
		Androstenedione was used by the country's athletes in order to reap the benefits of an elevated testosterone level while competing, and then a matter of hours later the certain levels would then drop well enough to ensure the passing of steroidal tests.
		Androstenedione has also passed two of the three governmental tests to be determined a steroid, the important thing is that it didn't pass the third.
		Androstenedione was the substance that Mark McGuire credited his seventy home runs to, but the athlete claims he has discontinued the use of the substance due to the controversy and the fact that he feels it's the responsible thing to due as a role model.
	www.bodybuilding.com /fun/mercer11.htm (920 words)

	What is Androstenedione?
		Androstenedione is an androgenic pro-hormone similar to DHEA, which is naturally produced in the bodies of both men and women.
		Androstenedione is the next metabolic step down from DHEA and only one step away from testosterone.
		Athletes are using androstenedione to help ensure that their levels of this natural hormone are at normal levels at all times.
	www.fitnessone.com /magazine/androstenedione.html (501 words)

	androstenedione
		Androstenedione is an immediate precursor to both testosterone and estrone, both of which may be subsequently converted to estradiol.
		In normal pubertal and adult men, the major portion of Androstenedione is derived from the testis, either directly or from conversion of testosterone, while in normal adult women, essentially equivalent amounts of Androstenedione are produced by the adrenal gland and ovary (2,3).
		I labelled Androstenedione competes with the Androstenedione to be measured present in the sample or in the calibrator for a fixed amount of antibody sites being immobilized to the wall of a polystyrene tube.
	www.bio-line.com /androstenedione.htm (1349 words)

	Androstenedione
		Androstenedione, (pronounced "an- drostene-dye-own") is a metabolite of DHEA and a natural pre-cursor of testosterone.
		Androstenedione, produced in the body from either 17-a-hydroxyprogesterone or dehydroepiandrosterone (DHEA), was first synthesized in 1935.
		Confirmation of the effectiveness of androstenedione is contained in a German patent which claims that 50 mg of oral androstenedione can raise plasma testosterone levels in men from 140% to 183% of normal.
	www.thehormoneshop.com /androstenedione.htm (1477 words)

	Andro: Mark McGwire
		Androstenedione is outlawed by these sports groups because it is thought to provide an unfair advantage and possibly to have damaging side effects.
		Simply to say that androstenedione "has no proven anabolic steroid effect or significant side effects" (as stated in a joint statement from the Cardinals and McGwire) is not enough.
		Regardless of whether or not androstenedione can help drive a ball 400 yards or so, millions of youngsters have been watching McGwire, admiring their hero, and unfortunately getting the idea that users of performance-enhancing substances are winners -- it's just part of the game.
	www.hhp.ufl.edu /faculty/pbird/keepingfit/ARTICLE/andro.htm (636 words)

	ThirdAge: Androstenedione
		Androstenedione is a hormone produced naturally in the body by the adrenal glands, the ovaries (in women), and the testicles (in men).
		Androstenedione is widely used by athletes who believe that it can build muscle and increase strength.
		Curiously, some evidence suggests that androstenedione does raise testosterone levels levels in women; again, this is not likely to produce favorable results, and it could cause harm (see Safety Issues).
	www.thirdage.com /healthgate/files/21491.html (717 words)

	Androstenedione : by Ray Sahelian, MD, androstenedione side effects, androstenedione information
		Androstenedione is mostly made in the adrenal glands and testicles but can also be made in other parts of the body.
		Androstenedione is banned by the International Olympics Committee, professional tennis, the National Football League and the National Collegiate Athletics Association.
		Androstenedione is potentially an alternative to DHEA or testosterone as a form of androgen replacement in aging men or women.
	www.raysahelian.com /androstenedione.html (1325 words)

	Androstenedione
		Androstenedione is taken orally in a concentrated pill or capsule and is now available in a spray that can be administered under the tongue for quicker results.
		Androstenedione has a steroid-like structure, and some researches claim that it is a weak anabolic steroid.
		This suggests that ingesting androstenedione would not affect the body in producing testosterone as in the case where elevated levels of testosterone may affect the self-production of the testosterone.
	www.udel.edu /chem/C465/senior/fall00/Performance1/andro.htm.html (1040 words)

	NTP: Executive Summary Androstenedione
		Androstenedione is presented to the CSWG for review because of its potential for abuse by athletes and bodybuilders as a steroidal precursor to testosterone.
		Androstenedione is also a dietary supplement being used by body builders and other athletes as a male hormone booster to "peak out" testosterone levels before and during work outs (Discount Natural Foods, 1998).
		In postmenopausal women, the conversion of androstenedione to estrone and of testosterone to estradiol by the P450 enzyme, aromatase, in peripheral tissues, including adipose tissue, skin, muscle, liver and breast tissue is the major source of endogenous estrogen (Wiseman and Goa, 1996).
	ntp-server.niehs.nih.gov /index.cfm?objectid=03DA7E02-CB9C-27DA-CA368A95BA5DDF69 (2863 words)

	Androstenedione
		Androstenedione is a natural hormone which is a direct precursor to testosterone.
		Yes, Androstenedione is a natural substance found in humans, animals and in the pollen from many plants.
		Androstenedione is a natural hormone proven to increase testosterone levels.
	www.betterbodz.com /androstenedione.html (302 words)

	What are the side effects of androstenedione?
		Androstenedione is a dietary supplement promoted to increase levels of the hormone testosterone.
		In addition, androstenedione has been reported to cause hair loss, blurred vision, acne, enlarged breasts, shrunken testicles, and rarely, liver cancer.
		The safety of androstenedione for longer-term use is not known.
	www.drugstore.com /qxa1331_332828_sespider-what_are_the_side_effects_of_androstenedione.htm (335 words)

	Viggah™ - Androstenedione
		Androstenedione is a precursor to testosterone –; only one step away from becoming testosterone in the body’s chemical pathway.
		Androstenedione in a liposome transdermal cream is an effective delivery system which works in synchronization with a man’s own hormone metabolism to boost blood testosterone levels.
		Androstenedione is a weak male hormone or androgen, an intermediate steroid made by the adrenal glands and the gonads of men and women for one ultimate purpose – the creation of the primary male hormone testosterone.
	www.springboard4health.com /products/viggah/viggah_main.html (381 words)

	Androstenedione - Swedish MC, Seattle, Washington, WA
		Androstenedione is said to enhance athletic performance and strength by increasing testosterone production, thereby building muscle.
		According to one case report, use of androstenedione was associated with loss of libido and decreased sperm count in a 29 year old bodybuilder.
		A man who was using androstenedione to improve his physique experienced priapism (painful continuous erection) for over 30 hours, requiring a visit to the emergency room.
	www.swedish.org /110792.cfm (786 words)

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