The start of a new year is increasingly a time when people choose to abstain from drinking for a month. We’re using the moment as an opportunity to revisit an episode from last year, about new health guidelines in Canada that raise questions about whether there’s any safe amount of alcohol to consume.

This episode was produced by Amanda Lewellyn and Miles Bryan, edited by Matt Collette, fact-checked by Laura Bullard, engineered by Efim Shapiro, and hosted by Sean Rameswaram.

Transcript at vox.com/todayexplained

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