Costco faces proposed class action over alleged heavy metals in Orgain protein powder

Seven customers filed a proposed class action lawsuit July 7 in Washington state federal court alleging Costco sells Orgain Organic Protein Powder in vanilla bean and creamy chocolate fudge that contains heavy metals. The complaint states the powder was advertised as having quality ingredients and higher standards, yet independent testing found lead, cadmium and arsenic.

Plaintiffs say a Texas customer conducted separate lab testing that confirmed the presence of the metals.

Testing cited in complaint Clean Label Project reported in a January 2025 news release that it found toxins in the Orgain powder and other brands. Consumer Reports also detected lead in the powder in an October 2025 report. Texas Attorney General Ken Paxton cited both organizations' findings in June 2026 and announced an industry-wide investigation into protein powder manufacturers.

Health claims in lawsuit The complaint alleges exposure to the metals can cause cancers, gastric and vascular disorders, liver, kidney and brain damage, miscarriages and reproductive disorders. It states there are no known safe levels of heavy metals for human consumption because the substances accumulate in the body.

Plaintiffs argue the presence of the metals negates the product's advertised purpose as a nutritional supplement.

Requested relief The suit claims Costco violated the Washington Consumer Protection Act by failing to disclose the alleged ingredients. Plaintiffs seek unspecified monetary damages and an order requiring Costco to disclose heavy metal content on packaging or advertising if sales continue.