Androgenic supplementation in men: effects of age, herbal extracts, and mode of delivery

dc.contributor.advisor Douglas S. King
dc.contributor.author Brown, Gregory
dc.contributor.department Kinesiology
dc.date 2018-08-24T19:00:14.000
dc.date.accessioned 2020-07-02T06:15:47Z
dc.date.available 2020-07-02T06:15:47Z
dc.date.copyright Tue Jan 01 00:00:00 UTC 2002
dc.date.issued 2002-01-01
dc.description.abstract <p>Ingesting androstenedione alone or with herbal extracts, or androstenediol with herbal extracts purportedly increases serum [testosterone] in men. The addition of herbal extracts is purported to prevent the conversion of testosterone precursors into estrogens or dihydrotestosterone. The effects of ingesting androstenedione, androstenedione + herbal extracts, and androstenediol + herbal extracts on serum [testosterone], [estradiol], [dihydrotestosterone], [prostate specific antigen] (PSA), and blood lipids was investigated in 30 to 59 year old men. Subjects were randomly assigned to consume ASD (300 mg/day androstenedione; n = 28), 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), AND-HB (300-mg androstenediol, 480-mg saw palmetto, 450-mg indole-3-carbinol, 300-mg chrysin, 1,500 mg gamma-linolenic acid, and 1,350-mg Tribulus terrestris per day; n = 28), or placebo (n = 27) for 28 days. Serum [free testosterone], [total testosterone], [androstenedione], [dihydrotestosterone], [estradiol], [PSA], and [lipids] were measured before and throughout the 4-week supplementation period. Serum [total testosterone] and [PSA] were unchanged by supplementation. Serum [androstenedione] (174%, 342%, and 300%), [free testosterone] (37%, 38%, and 45%), [dihydrotestosterone] (57%, 71%, and 83%), and [estradiol] (86%, 103%, 68%) were elevated (P < 0.05) for AND-HB, DION, and ASD, respectively. Serum [HDL-C] was reduced (P < 0.05) similarly by 0.13 mmol·l-1 in ASD, DION and AND-HB. There is no difference in the serum [testosterone], [estradiol], [dihydrotestosterone], [PSA], and [lipid] response to ingesting androstenedione alone, androstenedione + herbal extracts, or androstenediol + herbal extracts.;Orally ingested androgens undergo a large degree of digestive and hepatic breakdown. Therefore, we evaluated the hormonal response to sublingual cyclodextrin androstenediol. Eight males (22.9 +/- 1.2 y) consumed either 20 mg androstenediol in a sublingual cyclodextrin tablet (SL-DIOL) or placebo. Blood samples were collected before supplementation and every 30-min for 3 h after supplementation. Serum [androstenedione] was increased 125% at 120 min, serum [free testosterone] was increased 118% at 60 min, serum [total testosterone] was increased 110% at 60 min, and serum [estradiol] was 71% elevated at 180 min in SL-DIOL. These data indicate that, in contrast to ingested androstenediol, sublingual cyclodextrin androstenediol intake increases serum [androstenedione], [free testosterone], [total testosterone], and [estradiol].</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/rtd/981/
dc.identifier.articleid 1980
dc.identifier.contextkey 6088734
dc.identifier.doi https://doi.org/10.31274/rtd-180813-8799
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath rtd/981
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/82949
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/rtd/981/r_3061816.pdf|||Sat Jan 15 02:38:13 UTC 2022
dc.subject.disciplines Pharmacology
dc.subject.disciplines Pharmacy and Pharmaceutical Sciences
dc.subject.keywords Health and human performance
dc.subject.keywords Health and human performance (Biological basis of physical activity)
dc.subject.keywords Biological basis of physical activity
dc.title Androgenic supplementation in men: effects of age, herbal extracts, and mode of delivery
dc.type article
dc.type.genre dissertation
dspace.entity.type Publication
relation.isOrgUnitOfPublication f7b0f2ca-8e43-4084-8a10-75f62e5199dd
thesis.degree.level dissertation
thesis.degree.name Doctor of Philosophy
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