The former 100 metres world record holder, who faces a two-year ban if found guilty of a doping violation, told the hearing that he received "four injections" - including vitamin B12 - from Christopher Xuereb, who he had been working with for two months.

Powell said he started taking supplements from Xuereb about a month before his positive test for the banned stimulant Oxilofrine at the Jamaican Championships in June, where the sprinter was one of five athletes to return adverse doping results, including training partner Sherone Simpson, who tested positive for the same substance.

The Olympic gold medallist claims Xuereb told him to take two capsules of Epiphany D1 - which Powell claims was the source of the Oxilofrine - each morning for the first week, then double it for the second week, but testified that he did not list the supplements he was taking on his doping control form because he could not remember their names.

"I didn't remember to do that [double the dosage]," Powell said.

"Chris [Xuereb] came to my room the morning of the trials and said I must remember to take four."

Asafa Powell claims the supplement Epiphany D1 was the source of the banned substance Oxilofrine ©Getty Images


Powell also admitted he had not checked to see if Epiphany D1 was on the World Anti-Doping Agency's (WADA) list of banned products.

"I don't know the list, but I knew of the list," he said.

"I know there is a list we are supposed to check."

Similarly, three-time Olympic medallist Simpson claimed at her hearing last week she "never intentionally took a banned substance" and insisted a supplement provided by Xuereb was responsible for her positive test.

Her hearing resumes on February 4.

Xuereb has denied giving the pair performance enhancing drugs and claimed the sprinters should take responsibility for their failed doping tests.

"It is time the athletes took responsibility for their doping instead of looking around for a scapegoat, whether that person is their therapist, bartender or anyone else," he said last July.

"Athletes keep using the same story, which is to blame the scapegoat for their own wrongdoing."

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