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si pero he leido k es parecido a un steroide oral:S..
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¿Que es? es que no puedo verlo...
Analysis of non-ketoic steroids 17-methylepithiostanol and desoxymethyl- testosterone in dietary supplements
Masato Okano *, Mitsuhiko Sato, Ayako Ikekita, Shinji Kageyama
Anti-Doping Centre, Mitsubishi Chemical Medience Corporation, Tokyo, Japan
email: Masato Okano (Okano.Masato@mk.medience.co.jp)
*Correspondence to Masato Okano, Anti-Doping Centre, Mitsubishi Chemical Medience Corporation,3-30-1 Shimura, Itabashi-ku Tokyo, 174-8555, Japan.
Keywords
doping • desoxymethyltestosterone • 17-methylepithiostanol • supplement • atmospheric pressure photospray ionization • mass spectrometry
Abstract
Dietary supplements containing 17-methyl-2,3-epithio-5-androstane-17-ol (17-methylepithiostanol), which is a 17-methylated analogue of epithiostanol or a prodrug of desoxymethyltestosterone (17-methyl-5-androst-2-en-17-ol), have recently appeared on the Internet. 17-Methylepithiostanol and desoxymethyltestosterone are classified as prohibited substances on the World Anti-Doping Agency (WADA) list. Two preparations, EPISTANETM and P-PLEXTM, were obtained from the Internet so that their contents could be investigated. This study involved gas chromatography/mass spectrometry (GC/MS) analysis after trimethylsilyl (TMS) derivatization, liquid chromatography/mass spectrometry (LC/MS) in atmospheric pressure photoionization (APPI) mode and nuclear magnetic resonance (NMR) spectroscopy. Analysis using LC/MS in APPI mode would be a useful tool for detecting heat-labile and non-polar steroids.
Although the labelling of EPISTANETM indicates that it contains 17-methyl-2, 3-epithio-5-androstane-17-ol only, 17-methyl-2,3-epithio-5-androstane-17-ol and desoxymethyltestosterone were identified in the supplement. The results showed that P-PLEXTM contained desoxymethyltestosterone and its isomer 17-methyl-5-androst-3-en-17-ol. Urine samples can be screened after EPISTANETM or P-PLEXTM administration using the normal screening procedure for anabolic steroids with GC/MS. Copyright © 2009 John Wiley & Sons, Ltd.
Received: 25 June 2009; Revised: 13 September 2009; Accepted: 14 September 2009
Yo he echo dos ciclos de espistane combinado con 2 prohormonales mas
efectos segundarios iguales alos roids
debes tomar protectores como si de n ciclo se tratase
ganancias poco visibles y se van en cuanto dejas de tomarlo
conclusion: una porqueria