Lead was detected in 99 of 100 cat foods tested. Clean Label Project’s 2026 investigation found widespread contamination, but it did not establish that 99% of all cat food is dangerous.
What the 2026 cat-food study found
The Clean Label Project report covers 100 products from 62 brands, tested for more than 122 contaminants. Its reported detection rates include:
| Contaminant | Products with a detection |
|---|---|
| Lead | 99% |
| Cadmium | 96% |
| Arsenic | 94% |
Fish and seafood foods had about 18 times the mercury of other foods after accounting for format. Dry foods had roughly three times the lead of wet or air-dried products.
Results were expressed per 1,000 kilocalories. Comparing them with measurements per kilogram requires conversion.
Detection and danger are different questions
The group’s summary describes a category comparison, not individual-product safety determinations. Appearing on the tested list is not itself a recall notice.
The U.S. Food and Drug Administration explains that animal-food contaminants can occur naturally or enter during production. How regulators respond depends on the substance and the circumstances. Some contaminants are prohibited at any detectable level; others have regulatory limits.
Its chemical-contaminant guidance also distinguishes essential trace elements from non-essential metals such as lead, mercury, arsenic and cadmium. Amount and exposure matter when assessing harm. A laboratory detection therefore needs context before it becomes a conclusion about a pet’s health.
Before changing food, check these three things
- The exact product: keep the variety name, package size, lot number and best-before date. A broad brand name is not enough to identify the food in your cupboard.
- The evidence behind the claim: check whether a post links to the actual study, a product-specific recall or merely a screenshot of a headline.
- Your cat’s needs: discuss a proposed change with your veterinarian, especially if the food was chosen for an existing condition.
The FDA’s pet-food guidance directs questions about an individual animal’s diet and health to a veterinarian. Bring the product details and the report to that conversation; they are more useful than asking whether every food in an entire category should be avoided.
What Canadian readers should take from the findings
This study is not a nationwide survey of Canadian retail stock. Check the exact product and formulation sold where you live before assuming an online claim applies to it. The useful question is specific: what was measured, in which food, at what concentration, and what does that mean for this animal?
Read more evidence-led guides in NorthScope’s Explainers section.
Illustrative photograph: Bonnie Kittle / Unsplash, Unsplash License. No tested product is identified in the photograph.