The Clean Label Project, a Denver-based non-profit, was commissioned to study the toxins and nutritional information found in 134 of the top protein powders on the market. Sadly, the results were not good for all of our clean label protein powders. They found that 53 of the 134 protein powders tested with elevated levels of lead, mercury, arsenic, cadmium, and BPA. Interested in learning more? You can check out the infographic below for some of the key stats and you can also visit their website to see the full protein powder rankings.