A new study shows some popular protein powders and shakes lining grocery store shelves contain unsafe amounts of lead, with several products far exceeding what experts say is safe to consume in a single day.

Researchers recently tested 23 top-selling protein powders and ready-to-drink shakes and discovered more than two-thirds contained more lead per serving than experts consider safe for daily consumption, according to Consumer Reports .

"For many people, there’s more to lose than you’re gaining," Tunde Akinleye, the Consumer Reports food safety researcher who led the project, said.

Plant-based powders were among the worst offenders, containing nine times more lead on average than dairy-based options like whey.

Two protein powders, Naked Nutrition’s "Vegan Mass Gainer" and Hue

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