Asinga, who ran 9.89 and 19.97 last year, says he tested positive for the banned substance GW1516 due to a contaminated batch of Gatorade Recovery Gummies that he got from Gatorade at an awards ceremony. The gummies were falsely marked with the NSF Certified for Sport label which would mean they were contaminant free but have since tested positive for G1516. The AIU didn't buy it, banning him for four years & suggesting Asinga or someone close to him doctored evidence to cover up his doping.