IMUSA cookware is generally safe for everyday cooking, but the answer depends on which product line you’re using and how you use it. IMUSA sells uncoated aluminum pots (like their popular calderos), non-stick coated pans, and other kitchen items, and each comes with different considerations. The biggest concern isn’t aluminum exposure, which is minimal during normal cooking. It’s lead contamination in certain aluminum products and the presence of PFAS chemicals in their non-stick lines.
Lead in IMUSA Calderos
A King County Public Health investigation tested multiple IMUSA calderos (traditional cast aluminum cooking pots) purchased from Walmart and Lowe’s in 2021. All four calderos tested released lead at levels that exceeded the FDA’s interim reference level for children when food was left in contact with the pot for 24 hours. For a single 250 mL serving after 24 hours of contact, lead doses ranged from 3.73 to 4.63 micrograms, roughly double the 2.2 microgram daily threshold the FDA considers safe for children.
The picture was different for short cooking times. After just 15 minutes of contact, the same pots released only 0.15 to 0.23 micrograms of lead per serving, well below concerning levels for any age group. The lead amounts also stayed below the higher threshold set for adults who aren’t pregnant (8.8 micrograms per day). This matters because it tells you the risk is tied to how long food sits in the pot, not just whether you cook in it.
IMUSA has also been subject to a California Proposition 65 consent judgment specifically addressing lead in their aluminum cookware, including calderos and tortilla presses. Under that agreement, IMUSA is required to test products using a standardized lead leaching method and provide warnings on any cookware that exceeds 6 parts per billion of lead in testing. Products that test below that threshold are exempt from warning labels.
What This Means for Daily Cooking
If you use an IMUSA caldero to cook rice, beans, or stews and serve the food right away, your lead exposure from the pot itself is very low. The risk increases when you store food in the pot for hours, especially overnight. Acidic foods like tomato-based sauces, citrus marinades, or anything vinegar-heavy will pull more metals from uncoated aluminum than neutral foods will.
The practical takeaway: cook in your caldero, then transfer leftovers to glass or plastic storage containers. Don’t leave food sitting in the pot in the fridge. This single habit eliminates most of the lead exposure the testing identified. If you’re cooking for young children, this step is especially important since their developing bodies are more sensitive to even small amounts of lead.
Aluminum Exposure During Cooking
Separate from the lead question, some people worry about aluminum itself leaching into food. Aluminum cookware does release small amounts of the metal, particularly with acidic or salty foods. But the quantities are tiny. Even if you used uncoated aluminum for all your cooking and food storage, you’d take in only about 3.5 milligrams of aluminum per day from that source, according to analysis from McGill University’s Office for Science and Society. That’s a fraction of the 7 to 9 milligrams most people already consume daily through food, water, and medications like antacids.
The old concern that aluminum cookware contributes to Alzheimer’s disease has not held up under scientific scrutiny. Ryan Marino, a physician at Case Western Reserve University, has stated plainly that aluminum cookware is considered safe and that the amount it contributes to food is usually far less than what’s already present in the foods themselves. The medical consensus is that normal use of aluminum pots does not pose a neurological risk.
PFAS in IMUSA Non-Stick Products
IMUSA’s non-stick cookware uses PTFE-based coatings, the same type of material found in Teflon and most conventional non-stick pans. On their own website, IMUSA discloses that their non-stick products contain PFAS chemicals, specifically PTFE, PFA, and FEP, all used to create the slick cooking surface. PTFE is listed on California’s Biomonitoring Priority Chemicals list.
PTFE coatings are stable at normal cooking temperatures. The concern begins when non-stick pans are heated above roughly 500°F (260°C), which can happen if you preheat an empty pan or use it over high heat for extended periods. At those temperatures, the coating starts to break down and release fumes that can cause flu-like symptoms (sometimes called “polymer fume fever”). Below that threshold, the coating stays intact and very little transfers to food.
IMUSA’s non-stick pans are not unique in this regard. Nearly all conventional non-stick cookware on the market uses the same PTFE chemistry. If you want to avoid PFAS entirely, you’d need to switch to ceramic-coated, stainless steel, cast iron, or carbon steel cookware. If you choose to keep using IMUSA non-stick pans, sticking to low and medium heat settings and never preheating the pan empty will keep the coating stable.
How to Use IMUSA Cookware Safely
- Don’t store food in aluminum calderos. Cook and serve, then move leftovers to a separate container. This dramatically reduces lead and aluminum exposure.
- Limit acidic foods in uncoated aluminum. Tomato sauces, citrus, and vinegar-based dishes pull more metals from the surface. Use stainless steel or enameled pots for long-simmering acidic recipes.
- Keep non-stick pans on medium heat or below. High heat degrades the PTFE coating. If the pan starts to warp, discolor, or flake, replace it.
- Replace scratched non-stick pans. Once the coating is visibly damaged, it’s less effective and more likely to release particles into food.
- Check for Prop 65 warnings. If your IMUSA product carries a California Proposition 65 label, it tested above the lead threshold. That doesn’t mean it’s unusable, but it means you should be more careful about food contact time.
IMUSA cookware occupies the budget-friendly end of the market, and for many households, especially those cooking Latin American and Caribbean staples, their calderos and traditional pots are kitchen essentials. The products aren’t uniquely dangerous compared to other aluminum or non-stick cookware at similar price points. But the lead testing results from King County are worth taking seriously, particularly in homes with children. Simple habits like transferring food out of the pot after cooking go a long way toward reducing any risk.