Anabolic steroids are synthetic versions of the male hormone testosterone

U.S. drug authorities first learned about the steroid, called THG, this summer after an anonymous tip. It apparently was designed specifically to be undetectable by the standard test given to athletes.

Europe’s fastest man — 100-meter champion Dwain Chambers of Britain — has admitted taking it, and dozens of top Olympic and professional athletes have been subpoenaed to testify before a federal grand jury probing a California lab that sold alleged nutritional supplements. Now armed with a THG test, sports organizations are scrambling to retest athletes and decide what penalties to impose for its use.

Anabolic steroids are synthetic versions of the male hormone testosterone. Some are approved by the FDA to sell, by prescription only, to treat certain muscle-wasting diseases. But athletes use them illegally to bulk up.

Tuesday, the FDA finished its own testing of this newest steroid and formally declared THG a drug that would require its permission to sell in this country — making any use at this time illegal.

THG actually was derived by some simple chemical modifications of two well-known — and athletically banned — synthetic steroids, called trenbolone and gestrinone, said FDA Associate Commissioner John Taylor.

Anabolic steroids can have dangerous side effects, including liver damage, heart disease, anxiety and rage. While little is known about THG’s specific effects because it is so new, 카지노사이트 it likely poses similar risks, Taylor said.

“The greatest importance is preventing exposure and trying to nip this in the bud,” he said.

Four U.S. track and field athletes tested positive at a meet this summer for THG and Chambers flunked an out-of-competition drug test.

Chambers blamed his positive THG test on nutritional supplements he said were provided by a California lab, the Burlingame-based Bay Area Laboratory Co-Operative. He said through an attorney that he had been assured by BALCO founder Victor Conte that all the supplements he was given were within international rules.

U.S. drug authorities were able to unmask THG after an unidentified coach gave them a used syringe containing a substance he claims he got from BALCO. Conte has denied being the source.

Dozens of top Olympic and professional athletes – from baseball’s Barry Bonds and Jason Giambi to boxer Shane Mosley – have been subpoenaed to testify before a federal grand jury probing BALCO. Being subpoenaed does not imply wrongdoing.

BALCO was raided by the Internal Revenue Service and local drug agents in September. Conte’s attorney has confirmed his client is the target of the grand jury probe. The scope of the investigation is unclear, and federal officials have refused to comment.