Nearly half of the protein powders tested by the CleanLabel Project contained dangerous levels of heavy metals, such as arsenic and mercury.

Protein powders may contain high levels of lead and cadmium, with chocolate-flavored and plant-based products testing at the highest levels, a new report said.

Fact checked by Nick Blackmer A new report found higher-than-acceptable levels of the harmful metals cadmium and lead in many protein powders.Organic, plant-based, and chocolate-flavored protein powders had the highest levels of contamination.

Protein powder is a must for anyone getting serious about building muscle or maintaining muscle as the amino acids provided by protein powder are crucial

Chocolate protein powders contained up to 110 times more cadmium than vanilla-flavored powders, according to the Clean Label Project report from Jan. 9. Photo: Christopher Polk/ Nearly half of some of the most popular protein powders have levels of heavy metals like lead that exceed government food safety regulations,

A new report from the Clean Label Project says some popular protein powders may actually be poisonous. The report found “disturbing” levels of lead and cadmium in over-the-counter protein powers, with the highest amounts of the heavy metals being found in plant-based,

The report found that 77% of plant-based protein powders, 79% of organic protein powders and 65% of chocolate-flavored protein powders tested over California Proposition 65 safety thresholds for toxic metals.