Mo Farah claims he has never taken performance enhancing drugs while confirming that the only tests he has missed in his career to date were simply due to mistakes.
Controversy regarding doping allegations levelled at coach Alberto Salazar and training partner Galen Rupp has given way to increased scrutiny on the two-time Olympic gold medallist, with the Daily Mail revealing that he missed two out-of-competition tests in 2010 and 2011.
A third could have led to a ban of up to four years under UK anti-doping rules, but Farah insists there was never a suggestion of anything untoward.
"I have never taken performance enhancing drugs in my life and I never will," he said in a statement released via his official Facebook page.
"Over the course of my career I have taken hundreds of drugs tests and every single one has been negative. I've fully explained the only two tests in my career that I have ever missed, which the authorities understood, and there was never any suggestion that these were anything more than simple mistakes."
Farah, who withdrew from the Diamond League meeting in Birmingham earlier this month, held an emotionally charged press conference on 6 June, during which he lamented the fact that his name was being 'dragged through the mud' and claimed he would seek answers from Salazar upon his return to the US.
"The last two weeks have been the toughest of my life – with rumours and speculation about me that are completely false – and the impact this has had on my family and friends has left me angry, frustrated and upset," the 32-year-old continued.
"In particular, the media pressure on my young family and my wife, who is five months pregnant, is extremely painful, especially as I'm away training for some important races.
"As I made clear, I went to Portland to speak to Alberto Salazar and demand answers. He reassured me that the claims are false and that he will soon be providing evidence to make that clear. Until then I will not be commenting further on the allegations.
"I would like to take this opportunity to thank my fans, family, friends and teammates for all the great support they have provided over the last few days and hope that I will now be allowed to focus on my training and winning medals for my country."
Farah is due to return to the track in Monaco next month before heading back to the scene of his greatest professional triumph, the Olympic Stadium, for the Sainsbury's Anniversary Games.