Is traditional Mexican glazed pottery leaching lead into acidic food?

What's actually in it

Traditional Mexican glazed pottery often relies on lead-based glazes to achieve its signature finish. When these pieces come into contact with acidic foods, the glaze can break down. This process allows lead, a toxic heavy metal, to move from the pottery surface directly into your meal.

Lead is not something you want in your kitchen. Exposure to this metal is linked to serious health problems, as it can cause toxicity even at low, long-term levels, according to a 2026 study in J Appl Toxicol.

What the research says

A 2026 study in J Public Health Manag Pract specifically examined glazed pottery sold at the Mexico-US border. The research found that cooking acidic foods in these vessels leads to the enhanced leaching of soluble lead.

Because acidic foods like tomatoes, citrus, or vinegar speed up the breakdown of the glaze, the amount of lead that gets into your food increases significantly during the cooking process. This is a clear example of how traditional manufacturing methods can create hidden risks in your daily routine.