“On average, organic protein powders had three times more lead and twice the amount of cadmium compared to non-organic products,” said Jaclyn Bowen, executive director of the Clean Label Project, a nonprofit dedicated to transparent food labeling that released the new report Thursday.
Plant-based powders, such as those made from soy, rice, peas and other plants, contained three times more lead than whey-based products, according to the report. (Whey is the liquid byproduct of cheesemaking.)
Plants naturally absorb heavy metals from the planet’s crust but can contain elevated levels if grown in soil that has been further contaminated by mining, industrial waste, and some pesticides and fertilizers.
Another key source of contamination in protein powders was chocolate flavoring, according to the report.
“Chocolate-flavored protein powders contained four times more lead and up to 110 times more cadmium than vanilla-flavored powders,” Bowen said.