The AFL is committed to bringing the Essendon supplements scandal to a conclusion before the finals.

Deputy chief executive Gillon McLachlan has confirmed he expects the Australian Sports Anti-Doping Authority investigation to be finalised next month.   

"We're committed to bringing this investigation to an end with ASADA in August, prior to the finals series.  

"Just to close this down, there'll be a number of questions on Essendon. The reality is this, there is an end in sight - it's in August."  

McLachlan took just two questions on the topic at a news conference to announce the 2013 International Rules series on Wednesday morning.

McLachlan said he didn't want to add any further "running commentary."

"The reality is this, anything we could say would only raise more questions and potentially jeopardise the investigation," he said.  

"We're here to get the right outcome, and that is the facts."