MANCHESTER, N.H. —

Protein powders and shakes continue to grow in popularity, often marketed as workout fuel or meal replacements.

However, a recent investigation by Consumer Reports found that some supplements contain concerning levels of lead.

Consumer Reports tested 23 popular protein powders and shakes and found that more than two-thirds contained more lead in a single serving than experts consider safe for an entire day. In some cases, levels were more than 10 times higher.

Plant-based products had the most concerning results.

"Specifically, when it came to plant-based powders, they had some of the highest levels of lead. They were nine times higher than the dairy-based protein powders we tested, and they were double that of the beef-based powders we tested," said Consumer Report

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