business
Costco hit with lawsuit alleging protein powder sold in stores contains 'dangerous' levels of lead, arsenic
By KTVU FOX 2 News
· July 9, 2026
· 1 min read
Costco has been hit with a class action lawsuit alleging that one of the products it sells contains "dangerous" levels of heavy metals, including lead, arsenic and cadmium.
Why this matters in The San Francisco
The lawsuit against Costco raises concerns for San Francisco residents who shop at the warehouse club's local stores. As a major retailer in the City and County of San Francisco, Costco's product safety affects a significant number of consumers. The presence of heavy metals like lead, arsenic, and cadmium in protein powder is particularly troubling given the product's popularity among health-conscious individuals who frequent gyms and fitness studios in the city. San Francisco's proactive stance on consumer protection and public health suggests that local officials may be watching this case closely. The city's residents, known for their high expectations for product safety and quality, will likely be awaiting the outcome of this lawsuit and any subsequent actions taken by Costco to ensure the safety of its products. This case may also prompt local health advocates to call for increased testing and regulation of supplements sold in San Francisco stores.
About this story
Original reporting by KTVU FOX 2 News . The San Francisco surfaces reporting from trusted publishers and adds local editorial context so readers can quickly understand what a story means for their community. We attribute every source, link to the original report, and follow a documented editorial standards policy. To understand how stories are selected and reviewed, read our about page .
For the complete original report, visit KTVU FOX 2 News . Have a tip or correction? Contact our newsroom .
Category: business ·
Published: July 9, 2026 ·
Source: KTVU FOX 2 News ·
Reading time: 1 min
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Frequently asked about this story
What is this story about? Costco has been hit with a class action lawsuit alleging that one of the products it sells contains "dangerous" levels of heavy metals, including lead, arsenic and cadmium.
When was this published? This article was first published on July 9, 2026 by KTVU FOX 2 News and curated for The San Francisco readers.
Who reported this story? This story was reported by KTVU FOX 2 News. To learn more about how The San Francisco selects and reviews stories, see our editorial standards .
Where can I find related coverage? See more business coverage from The San Francisco, or browse our daily briefing and topic hubs .
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