Need a little extra heavy metal with your morning smoothie? Consumer Reports tested 23 protein powders and shakes and discovered that over two-thirds are spiked with more lead than what their experts consider safe for an entire day. Some brands took the "mass" in "mass gainer" a bit too literally, packing in more lead than a Thompson submachine gun.

Consumer Reports tested 23 popular protein powders and shakes. The results? Over two-thirds contained more lead in a single serving than what CR's experts consider safe for an entire day. In some cases, levels were more than ten times higher.

Plant-based products had the most concerning results. Plant-based powders had some of the highest levels of lead. They were nine times higher than the dairy-based protein powders CR tested, and double th

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