Recent investigations by Consumer Reports into the contents of popular protein supplements have raised potential concerns. A Consumer Reports study examining 23 protein powders and shakes indicated that, according to the brand's own safety experts, over two-thirds contained lead levels deemed unsafe in a single serving, with some exceeding recommended daily limits significantly.

Furthermore, a report conducted from 2024 to 2025 by the Clean Project Label from 2024-2025 tested 160 protein powders, finding that 7% surpassed California Proposition 65 thresholds for toxic metals. This report highlighted that plant-based powders contained three times more lead than whey-based protein powders , chocolate powders had four times more lead than vanilla, and organic powders su

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