Australian swimming star Shayna Jack has vowed to clear her name after revealing her B sample has tested positive to the drug Ligandrol.
Australian swimming star Shayna Jack faces a ban that looks set to sideline her for the Tokyo Olympics after revealing her B sample tested positive to the drug Ligandrol.
It was believed Jack was still waiting for B sample results after Swimming Australia's shock announcement on Saturday that the 20-year-old had tested positive to a banned substance.
However, Jack posted on social media on Sunday that it had come back positive on July 19.
It had tested positive for Ligandrol, a non-steroid anabolic agent popular with bodybuilders and used for increasing muscle mass.
"On Friday the 19th of July my 'B sample' results were in," she posted.
"I had felt a sense of hope knowing I didn't take this substance and that it was all a mistake during the testing and that I could return to compete for my country and with the team, however, that wasn't the case.
"As I read the results, my brain couldn't even comprehend what I was seeing."
Jack said she had never heard of Ligandrol - a prescription-only drug - let alone pronounce it but believed it was found in "contaminated supplements".
She protested her innocence and vowed to clear her name as she faced an ASADA ban that will almost certainly shatter her dream of competing at the 2020 Olympics.
"Deep down, I feel I shouldn't have to defend my reputation as I know that I didn't do this," she said.
"I get tested approximately every four to six weeks so why would I take anything banned and do this to myself?
"Especially leading up to competition where I could be tested daily.
"Why would I put myself through this anguish and risk jeopardising my career and my character?
"I did not and would not cheat and will continue to fight to clear my name."
Swimming Australia (SA) said it couldn't comment on the B sample news until ASADA announced its sanction.
Jack's claim the B sample results came back on July 19 - two days before the world swimming titles started in South Korea - are a revelation.
SA officials and head coach Jacco Verhaeren at the world titles at Gwangju have only spoken of an A sample following confirmation of Jack's positive test.
SA chief executive Leigh Russell said on Sunday she understood Jack had planned to reveal the positive test on her A sample later this week - after the world titles ended when it wouldn't be a distraction for the Dolphins - before the bombshell dropped.
She said confidentiality required by SA's agreement with national anti-doping body ASADA didn't allow it to reveal Jack's test after the 20-year-old was notified and sent home from the team training camp in Japan on July 12, initially citing "personal reasons".
Russell on Sunday described Jack's A sample positive drug test as bitterly disappointing and embarrassing for the national swimming team, the sport and the country.
In November 2018, ASADA issued a blog warning about the rise of Ligandrol, also known as LGD-4033.
It said there had been 15 positive tests from 2015-17 - nine in 2017, six in 2016 and two in 2015.
"It is claimed to be a substance that induces muscle (and bone) growth without the side effects associated with steroid use," the ASADA blog said.
"However, information on the safety of LGD-4033 is scarce due to a lack of medium and long-term clinical trials - hence the medium and long-term health impacts are unknown."