Canadian distance runner Natasha Yaremczuk has been banned for 14 months after failing an anti-doping test in the Dublin marathon last October, which she claimed was the result of a food supplement.

The 38 year-old Yaremczuk, who lives in the US, finished as the 10th best woman overall in Dublin, in a time of 2:52:38. Afterwards she was selected for an in-competition test, carried out by Sport Ireland on behalf of the Dublin marathon, the full details of which have now been confirmed.

Last August, two months before Dublin, Yaremczuk produced the ninth-best time in the history of the Reykjavik Marathon winning in 2:53:25, a margin of almost 15 minutes.

She is also a former world-class triathlete for Canada (she competed at the Pan American Games and Commonwealth Games). She also ran 2:51:01 in the 2013 Toronto marathon, with a best of 2:47:15 from the 2014 Boston Marathon.