In a potential big step for the anti-doping the world, the World Anti-Doping Agency is set to review whether cannabis should continue to be a banned substance.  

The recent case of US sprinter Sha'carri Richardson was front and centre when she admitted to taking cannabis following the death of her mum. 

She was subsequently banned for a month which included the Tokyo Olympics.  

Former Olympian and professor emeritus in sports medicine at Otago University Dave Gerrard, has been around the anti-doping scene for decades and he joined Mike Hosking to discuss. 

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