Staub cookware is generally considered non-toxic. The cooking surface is made of glass-based enamel that creates a barrier between your food and the cast iron underneath, and the enamel complies with both EU and US safety standards for lead and cadmium. For everyday cooking, Staub is one of the safer options on the market.
What Staub Is Actually Made Of
Every Staub piece starts with a cast iron core. The recipe is roughly 85 percent metal (a mix of recycled scraps, hematite ore, pig iron, and steel), 10 percent coke (a carbon fuel used in smelting), and 5 percent limestone. Cast iron on its own is reactive, meaning acidic foods like tomato sauce can pull iron into your food and affect the taste. That’s where the enamel comes in.
The enamel coating is essentially a layer of glass fused to the cast iron at extremely high temperatures. It’s made from a mixture of pigments, glass particles, and minerals that are ground together until they form a smooth, consistent coating. Once fired, this glassy layer becomes the actual cooking surface, sealing off the raw iron so it never contacts your food directly. This is fundamentally different from cookware that relies on chemical non-stick coatings, which can release fumes at high heat. Staub’s enamel is inert and stable under normal cooking conditions.
Lead and Cadmium Safety
Lead and cadmium are the two heavy metals people worry about most with enamel cookware, and for good reason. Older or cheaply made enamelware has historically used these metals in colored glazes. Staub’s enamel is certified as lead- and cadmium-safe, meeting both EU regulations and California’s Proposition 65 standards. Prop 65 is one of the strictest consumer safety benchmarks in the world for chemical exposure. Staub’s parent company, Zwilling, publishes annual independent compliance audits to verify this.
It’s worth noting that “lead-safe” and “lead-free” aren’t exactly the same thing. Lead-safe means the levels are so low they fall well below the threshold considered harmful, which is the standard most reputable cookware brands meet. For practical purposes, the amount that could theoretically leach from Staub enamel during cooking is negligible.
The Black Interior Enamel
Staub’s signature matte black interior sometimes raises questions because it looks different from the smooth, light-colored enamel you see on brands like Le Creuset. The black interior is still enamel, not bare cast iron. It’s a rougher-textured enamel that develops better non-stick properties over time as oils build up in the surface. Because it’s dark, some people mistake it for exposed iron or assume it contains different chemicals. It doesn’t. It’s the same type of glass-based coating, just with a different finish and pigment.
When the Enamel Gets Damaged
The safety picture changes if your enamel chips or cracks. Most cookware companies, including Staub, advise against using pots and pans with chipped enamel. The concern isn’t really about the exposed cast iron underneath (cooking on bare cast iron is safe and has been done for centuries). The bigger risk is that once chipping starts, more small fragments can break off and end up in your food. Swallowing tiny bits of glass-like enamel isn’t something you want to do regularly.
Enamel damage typically happens from thermal shock or physical impact. Dropping a heavy lid on a hard floor, banging a metal spoon against the rim, or running cold water into a screaming-hot pot can all cause cracks or chips. The cast iron and the enamel expand at different rates when heated, so sudden temperature changes stress the bond between them. Hairline cracks called “crazing” can appear over time, and these eventually lead to flaking.
To keep your enamel intact, avoid preheating an empty pot on high heat, let the pot cool before washing, and use wooden or silicone utensils. If you notice chips on the cooking surface (not just the rim), it’s time to replace the piece.
How Staub Compares to Other Cookware
In the broader landscape of cookware safety, enameled cast iron sits near the top. It doesn’t release fumes at high temperatures the way older non-stick coatings can. It doesn’t leach metals the way uncoated aluminum or copper might. And unlike bare cast iron or carbon steel, it doesn’t add iron to your food, which matters for people who need to limit iron intake.
Stainless steel is the other material commonly considered very safe, and it’s a reasonable comparison. Both are inert cooking surfaces that don’t interact much with food. The main advantage of Staub’s enamel is that acidic ingredients like wine, vinegar, and tomatoes won’t react with it at all, while stainless steel can leach trace amounts of nickel and chromium when exposed to acidic foods for long periods.
If you’re choosing cookware primarily for safety, Staub is a solid pick. The enamel is stable, the heavy metals are well below regulatory limits, and the cooking surface won’t degrade under normal use. Just take care of the enamel, and it will take care of you for decades.