Protein powders, popular among athletes and health enthusiasts, may contain elevated levels of toxic heavy metals. A recent evaluation of powders intended for consumer use found troubling patterns in metal content across many products. Evaluators looked at products sold in North American markets and compared results across numerous brands. An independent testing body reported these findings.
Examining 160 samples from 70 brands, researchers found that 47% exceeded standards for lead content. In 21% of cases, lead levels were more than twice the acceptable limit. The results varied widely by product type and formulation, underscoring the need for transparent third party testing and clear labeling on metal content. Lead exposure carries health risks, with children vulnerable to cognitive effects and adults potentially facing cardiovascular and neurological consequences. Cadmium also poses kidney and bone risks when consumed regularly. An independent testing body reported these findings.
Plant-based powders derived from soy, rice, or peas showed nearly three times the lead concentration of whey-based powders. The difference highlights how the protein source can influence exposure to metals, possibly tied to soil quality, irrigation, and processing steps used in growing and manufacturing. The study also cautions that cross contamination during processing can occur. An independent testing body reported these results.
Organic powders tended to contain about three times more lead and twice as much cadmium than non-organic products. This challenges the assumption that organic labels ensure lower contaminants in supplements and points to other factors such as soil metal content and manufacturing practices. The finding invites more rigorous testing across all labeled categories. An independent testing body reported these results.
Flavor mattered a great deal. Chocolate flavored powders were among the least safe, with lead levels about four times higher and cadmium up to 110 times higher than vanilla flavored powders. Cocoa processing, roasting, and additions used for chocolate flavoring may contribute to these disparities. The results urge careful consideration of flavoring components in addition to the base protein. An independent testing body reported these results.
Scientists note that plants naturally absorb heavy metals from water and soil, which can explain variability across plant-based options. Dark chocolate ingredients have been shown to accumulate lead and cadmium more readily than other components. The findings illustrate the complexity of how metals enter food products and the need for ongoing monitoring and independent verification of claims. An independent testing body reported these results.
Vanilla flavored powders made from peas, whey, or eggs appeared among the safest in the dataset, showing lower heavy metal concentrations than many other flavors. Earlier researchers had questioned the value and safety of certain sports supplements, a discussion that these findings feed into as consumers seek safer choices. The overall message is a reminder to check metal content and labeling before purchasing. An independent testing body reported these results.