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Costco Faces Class-Action Lawsuit Over Heavy Metals in Protein Powder

Costco Wholesale is facing a proposed class-action lawsuit alleging that an exclusive protein powder sold in its warehouses contained undisclosed heavy metals. The complaint claims Costco failed to warn customers about potential contamination. The case raises questions about Costco's product quality controls and consumer trust.

July 13, 2026
2 min read
Source: Simply Wall St.
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Costco Wholesale (NasdaqGS:COST) is facing a proposed class-action lawsuit alleging that an exclusive protein powder sold in its warehouses contained undisclosed heavy metals. The complaint claims Costco failed to warn customers about potential contamination in a widely marketed product.

Details of the Action

The lawsuit, filed as a proposed class action, alleges that the exclusive protein powder contains undisclosed heavy metals. It does not specify the concentration levels or the exact metals involved but focuses on Costco's failure to disclose this information to consumers.

Company's Position

Costco has not yet issued an official statement regarding the lawsuit. The company is expected to respond within the legal timeframe. Costco typically enforces strict product quality policies, making this case a test of its reputation.

Precedents and Context

This is not the first time food companies have faced lawsuits over heavy metals in supplements. Similar cases have been filed against other companies in the sector, indicating increased scrutiny from consumers and regulators.

Potential Financial Impact

It is too early to estimate the financial impact of the lawsuit, as it is still in its early stages. However, any adverse ruling could lead to financial damages and legal costs, as well as potential reputational harm affecting sales and revenue.

Frequently Asked Questions

Costco faces a class-action lawsuit alleging that an exclusive protein powder contains undisclosed heavy metals.

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This article was rewritten in Wrqti's editorial style based on information from the original source above. Content is informational only — not investment advice.