Epitestosterone: Difference between revisions
TimGillespie (talk | contribs) No edit summary |
No edit summary |
||
| Line 23: | Line 23: | ||
}} |
}} |
||
Epitestosterone is a natural [[steroid]], chemically similar to [[testosterone]]. |
Epitestosterone is a natural [[steroid]], chemically similar to [[testosterone]]. Epitestosterone is believed to form in a similar way to testosterone, however, the exact site of its formation is unknown. Furthermore, exogenous administration of testosterone does not affect levels of epistestosterone in the body. |
||
As a result, tests to determine the ratio of testosterone to epitestosterone in urine are used to find athletes who are [[Doping (Sport)|doping]]. A normal healthy person has a ratio of about 1:1 testosterone to epitestosterone in their urine<ref>{{cite news | url=http://www.asada.gov.au/substances/facts/testosterone.htm | title=Substances: Testosterone to epitestosterone (T/E) ratio | publisher=Australian Government | date=Tuesday, February 28, 2006}}</ref>. |
|||
It was revealed on [[July 27]], [[2006]] that [[Floyd Landis]], winner of the [[2006 Tour de France]], had a testosterone to epitestosterone ratio of 11:1 {{fact}}, in violation of the 4:1 limit imposed by the race organizers, suggesting doping, though this may have been caused by a low epitestosterone level rather than an artificially elevated testosterone level. Landis has also claimed that an elevated testosterone level could be related to his [[hypothyroidism]]. |
It was revealed on [[July 27]], [[2006]] that [[Floyd Landis]], winner of the [[2006 Tour de France]], had a testosterone to epitestosterone ratio of 11:1 {{fact}}, in violation of the 4:1 limit imposed by the race organizers, suggesting doping, though this may have been caused by a low epitestosterone level rather than an artificially elevated testosterone level. Landis has also claimed that an elevated testosterone level could be related to his [[hypothyroidism]]. |
||
| Line 32: | Line 32: | ||
==External links== |
==External links== |
||
[http://www.nytimes.com/2006/07/27/sports/othersports/27cnd-doping.html?ei=5094&en=f616263b07608f96&hp=&ex=1154059200&adxnnl=1&partner=homepage&adxnnlx=1154019757-CjNJWUKLfj1Nxefcjj2ehQ Landis Fails Drug Test After Triumph in Tour de France] |
[http://www.nytimes.com/2006/07/27/sports/othersports/27cnd-doping.html?ei=5094&en=f616263b07608f96&hp=&ex=1154059200&adxnnl=1&partner=homepage&adxnnlx=1154019757-CjNJWUKLfj1Nxefcjj2ehQ Landis Fails Drug Test After Triumph in Tour de France] |
||
[http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=14630088&dopt=Abstract Institute of Endocrinology Abstract on Epistestosterone] |
|||
==Notes== |
==Notes== |
||
Revision as of 06:34, 30 July 2006
| Identifiers | |
|---|---|
| |
| CAS Number | |
| CompTox Dashboard (EPA) | |
| ECHA InfoCard | 100.169.813 |
| Chemical and physical data | |
| Formula | C19H28O2 |
Epitestosterone is a natural steroid, chemically similar to testosterone. Epitestosterone is believed to form in a similar way to testosterone, however, the exact site of its formation is unknown. Furthermore, exogenous administration of testosterone does not affect levels of epistestosterone in the body.
As a result, tests to determine the ratio of testosterone to epitestosterone in urine are used to find athletes who are doping. A normal healthy person has a ratio of about 1:1 testosterone to epitestosterone in their urine[1].
It was revealed on July 27, 2006 that Floyd Landis, winner of the 2006 Tour de France, had a testosterone to epitestosterone ratio of 11:1 [citation needed], in violation of the 4:1 limit imposed by the race organizers, suggesting doping, though this may have been caused by a low epitestosterone level rather than an artificially elevated testosterone level. Landis has also claimed that an elevated testosterone level could be related to his hypothyroidism.
External links
Landis Fails Drug Test After Triumph in Tour de France Institute of Endocrinology Abstract on Epistestosterone
Notes
- ^ "Substances: Testosterone to epitestosterone (T/E) ratio". Australian Government. Tuesday, February 28, 2006.
{{cite news}}: Check date values in:|date=(help)