Is it safe to cook with old cast iron pans that have rust?
Depends on the product. New, certified cookware is low risk. Old or imported ceramics may leach heavy metals.
What's actually in it
Heavy metals like nickel, chromium, lead, and cadmium can leach from cookware, ceramics, and food storage containers. Acidic foods speed up leaching.
Stainless steel can release nickel and chromium. Older or imported ceramics may contain lead in the glaze. Even "food-safe" products can leach trace amounts under repeated use and heat.
What the research says
A 2026 study in adv nutr looked at chemical exposure from everyday products and found: Bioavailability of and US Infant Exposure to Arsenic, Cadmium, Lead, Mercury, and Per- and Polyfluoroalkyls from Human Milk and Infant Formula: Results from a.
The research at a glance
What to use instead
Browse our vetted, non-toxic alternatives. Every product is third-party certified.
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