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Androstenedione

Related Topics:

• Testosterone replacement / Aromatization / Chrysin / I3C / Anabolic Steroids

News & Research:

• Creatine Linked to Testicular Cancer - WebMD, 4/16/15 - "Men who use muscle-building supplements containing creatine or androstenedione may have a higher risk of getting testicular cancer ... This risk seems to rise even more among men who begin using the supplements before age 25 ... almost 20% of participants with testicular cancer had used muscle-building supplements"
• 'Andro' to Require a Doctor's Prescription - WebMD, 6/3/04
• Feds Move Against Andro Makers - WebMD, 3/11/04
• 'Andro' Offers No Anti-Aging Effect - WebMD, 6/10/03 - "a new study shows no evidence that it boosts testosterone levels"
• The Science and Policy of Performance Enhancing Supplements - Life Extension Magazine, 9/02 - "The UCLA Olympic Analytical Laboratory examined 12 different brands of various andro products. The results showed that most did not contain what they claimed in either dose or type of andro listed. Of the 12 tested, seven brands contained only 45% to 85% of label claim and several contained compounds not listed on the label, including testosterone"
• ACSM Conference Unveils Performance Enhancers - Nutrition Science News, 9/01 - "randomly assigned to receive either 344 mg Norandro or placebo ... no significant changes in any of the parameters measured"
• Andro May Contain Unwanted Surprise, Study Finds Levels of Byproduct Sufficient to Disqualify Olympic Athletes - WebMD, 11/21/00 - "the urine of all 24 men who consumed andro contained 19-norandrosterone, a byproduct of the banned steroid nandrolone. Twenty of the men's samples contained enough of the steroid byproduct to test positive at the Olympics"
• 'Andro' Doesn't Help and May Harm, Popular supplement may boost risk for prostate cancer and heart disease - WebMD, 11/13/00
• Andro May Not Help Older Athletes - Intelihealth, 11/13/00 - "Andro's ability to raise levels estradiol, which can make breast tissue grow in men, is another powerful argument for making the supplement prescription-only, said Dr. Gary I. Wadler, a sports drug expert at New York University School of Medicine."
• Popular Steroid May Cause More Harm Than Good To Middle-Aged Men - Doctor's Guide, 11/6/00 - "During the 28-day study, researchers investigated the effects of ingesting 100 mg of ASD three times a day compared to placebo in 56 healthy men between the ages of 30 and 56. The investigators did not find an increase in total testosterone levels, but did find a 40 to 50 percent increase in free testosterone levels and a 55 to 110 percent increase in dihydrotestosterone (DHT). DHT is a powerful form of testosterone that does not have an effect on skeletal muscles, but instead it can cause the prostate to enlarge ... The ASD group also experienced a 55 to 80 percent increase in estrogen, the female sex hormone, which can cause breast enlargement in males and may have other negative health consequences."
• Performance-Enhancing Supplements Not for Everyone - WebMD, 6/5/00
• Androstenedione Use May Increase Testosterone And Estrogen Levels - Doctor's Guide, 2/8/00 - "the group of men who took 300 mg per day had an average 34 percent increase in testosterone levels on the seventh day of the study when compared to their baseline levels taken before the study began. There was a 128 percent increase in estradiol levels. In addition, the study showed an increase in estrone (another estrogen hormone) among those taking andro. Study participants taking 100 mg. per day showed some increases in estradiol levels but not testosterone levels. The authors say the increases were not statistically significant"
• It's About Time - McGwire Is Off Andro - Dr. Dean, 8/17/99
• Androstenedione -- Mother Nature's Little Joke - Life Enhancement Magazine, 8/99
• Study: McGwire's Supplement Does Nothing For Strength, May Cause Harm - Intelihealth, 6/2/99
• Study debunks androstenedione muscle benefits - CNN, 6/1/99

Abstracts:

• Effects of androstenedione-herbal supplementation on serum sex hormone concentrations in 30- to 59-year-old men - Int J Vitam Nutr Res 2001 Sep;71(5):293-301 - "Subjects were randomly assigned to consume DION (300 mg androstenedione, 150 mg dehydroepiandrosterone, 540 mg saw palmetto, 300 mg indole-3-carbinol, 625 mg chrysin, and 750 mg Tribulus terrestris per day; n = 28) or placebo (n = 27) for 28 days ... Serum concentrations of total testosterone and PSA were unchanged by supplementation. DION increased (p < 0.05) serum androstenedione (342%), free testosterone (38%), dihydrotestosterone (71%), and estradiol (103%) concentrations. Serum HDL-C concentrations were reduced by 5.0 mg/dL in DION (p < 0.05) ... While the ingestion of androstenedione combined with herbal products increased serum free testosterone concentrations in older men, these herbal products did not prevent the conversion of ingested androstenedione to estradiol and dihydrotestosterone"