Picking up a tub of protein powder from Costco, that cathedral of bulk purchases and cautious optimism, and thinking you’re doing something good for your body is almost ironic. Every week, millions of people engage in this activity. After reading terms like “clean nutrition” and “high quality” on the label, they put the container in their oversized cart and go home with a sense of responsibility. A federal lawsuit is currently focused on that assumption.
Seven customers filed a proposed class-action lawsuit against Costco Wholesale Corporation regarding Orgain Organic Plant-Based Protein Powder in a federal court in Washington on July 7, 2026. The law firm Hagens Berman filed the complaint, which claims that some Orgain products, particularly the Vanilla Bean and Creamy Chocolate Fudge varieties, contain heavy metals like lead, cadmium, and arsenic that were never disclosed to customers.
It is hard to ignore the figures mentioned in the lawsuit. According to independent laboratory testing that the plaintiffs’ lawyers ordered, some samples had lead concentrations as high as 67 parts per billion. According to the plaintiffs, one sample of the Vanilla Bean flavor had 3.37 micrograms of lead per serving, which is approximately 674 percent higher than California’s Proposition 65 safe harbor threshold. Every sample that was tested contained cadmium. Arsenic, which ranged from about 12 to 18 parts per billion, was also present everywhere.
The plaintiffs contend that because of marketing that promised pure, premium ingredients, they were paying about $30 per container.
The lawsuit claims that heavy metals were not mentioned at all in the packaging. The legal case is motivated by the discrepancy between the promise and the purported reality, which is difficult to overlook.
Orgain has given a thoughtful response. A representative for the company told the Seattle Times that “trace amounts of substances that occur in the environment can be present in plant-based ingredients” and insisted that its goods meet all relevant food safety regulations. That’s a valid point, and it’s important to keep in mind. Rice, peas, and other crops that naturally take up metals from the soil are common sources of plant-based proteins. Trace contamination is not a secret that only Orgain possesses; it is a known problem throughout the entire category.
However, the issue of disclosure is what elevates the Costco Orgain protein powder lawsuit above background noise in the supplement industry. In addition to claiming that heavy metals are present, the plaintiffs contend that neither Costco nor Orgain required or carried out the kind of testing that could have identified the issue prior to products being placed on store shelves, and that consumers had no way of knowing. According to the complaint, Costco “knew or should have known” about the contamination, despite its sophisticated supply-chain operations and annual revenue of over $240 billion. Even if the courts come to a different conclusion, that is a serious accusation.
This lawsuit did not appear out of the blue. Last year, Consumer Reports released data indicating that protein powders were increasingly contaminated with heavy metals, with over two-thirds of tested products having lead levels that their experts deemed dangerous for daily use. Similar issues have been raised by the Clean Label Project. The current research is used in the Costco Orgain protein powder lawsuit to support the claim that the issue was overlooked.
How far this case will go is still unknown. There hasn’t been an FDA recall, and class-action lawsuits in the food and supplement industry frequently settle without any admission of misconduct. Orgain is still selling its goods. However, the lawsuit will probably continue to put pressure on the supplement industry, which has been operating for decades with comparatively few mandatory testing requirements. Watching this case develop is likely to be more unsettling than comforting for customers who picked up that container from the Costco aisle believing they were making a health-conscious decision. One could reasonably argue that it ought to.
