Demand for protein powders and shakes has soared in recent years as influencers and health gurus have touted the nutrient’s benefits for weight loss and muscle gain. But the benefits could come at a cost. A recent Consumer Reports investigation found unsafe levels of lead in many popular protein supplements. More than two-thirds of the products tested had more lead in a single serving than food safety experts say is safe to consume in an entire day.

Hannah Cutting-Jones is a food historian and assistant professor in the University of Oregon’s global studies department. She’s written about the rise of protein as a diet trend and joins us to talk about what it’s meant for consumers.