The recent popularity of Ozempic has led to concerns about the supply of the injectable drug for patients who actually need it for its intended purpose. Ozempic is approved in Canada for treatment of Type 2 diabetes, as is Rybelsus, a similar drug which comes in a tablet. But it's increasingly being used off-label for weight loss by otherwise healthy people here and especially in the United States . With supplies sometimes running short, some influencers on TikTok and other social media are now touting a so-called "miracle" herbal supplement, berberine, as another shortcut to weight loss — even fashioning...