According to the Canadian Centre on Substance Use and Addiction, people should limit their alcohol consumption to just two drinks per week to avoid certain cancers and other health issues. The new health guidelines significantly reduce the number of drinks considered risky — the previous recommendation capped weekly consumption at 15 drinks for men and 10 drinks for women.

On today’s episode, Tim Naimi, director of the Canadian Institute For Substance Use Research at the University of Victoria and a member of the scientific advisory panel that contributed to the new guidelines, tells us what’s behind the changes.