Mo Farah: Doctor says L carnitine injection not recorded correctly BBC Sport L carnitine, une substance prise par Mo Farah avant le Marathon de Londres 2014 Four time Olympic champion Mo Farah lied about taking controversial supplement L carnitine before the 2014 London Marathon. : r olympics Panorama show Mo Farah changed account to anti doping investigators The Irish Times Mo Farah admitted taking performance enhancing supplement minutes after 'repeatedly denying' it in Salazar investigation The Independent The Independent Barry Fudge, physiologist and former UK Athletics head of endurance, says Mo Farah's victories were due to meticulous planning, hard work and determination as opposed to "some magical drug or illicit aid".