cookware Archives - Amazing Health Advances

Is Stainless Steel or Cast Iron Cookware Best? Is Teflon Safe?

The AHA! Team — Mon, 18 Nov 2024 06:38:10 +0000

Michael Greger M.D. FACLM via Nutrition Facts – What is the best type of pots and pans to use? In my last video, I expressed concerns about the use of aluminum cookware. So, what’s the best type of pots and pans to use? As I discuss in my video Stainless Steel or Cast Iron: Which Cookware Is Best? Is Teflon Safe?, stainless steel is an excellent option. It’s the metal chosen for use “in applications where safety and hygiene are considered to be of the utmost importance, such as kitchenware.” But what about studies showing that the nickel and chromium in stainless steel, which keeps the iron in stainless unstained by rust, can leach into foods during cooking? The leaching only seems to occur when the cookware is brand new. “Metal leaching decreases with sequential cooking cycles and stabilizes after the sixth cooking cycle,” after the sixth time you cook with it. Under more common day-to-day conditions, the use of stainless steel pots is considered to be safe even for most people who are acutely sensitive to those metals. A little leaching metal can even be a good thing in the case of straight iron, like a cast iron skillet, which can have the “beneficial effect” of helping to improve iron status and potentially reduce the incidence of iron deficiency anemia among children and women of reproductive age. The only caveat is that you don’t want to fry in cast iron. Frying isn’t healthy regardless of cookware type, but, at hot temperatures, vegetable oil can react with the iron to create trans fats. What about using nonstick pans? Teflon, also known as polytetrafluoroethylene (PTFE), “is used as an inner coating material in nonstick cookware.” Teflon’s dark history was the subject of a 2019 movie called Dark Waters, starring Mark Ruffalo and Anne Hathaway. Employees in DuPont’s Teflon division started giving birth to babies with deformities before “DuPont removed all female staff” from the unit. Of course, the corporation buried it all, hiding it from regulators and the public. “Despite this significant history of industry knowledge” about how toxic some of the chemicals used to make Teflon were, it was able to keep it hidden until, eventually, it was forced to settle for more than half a billion dollars after one of the chemicals was linked to “kidney and testicular cancers, pregnancy-induced hypertension, ulcerative colitis, and high cholesterol.” “At normal cooking temperatures, PTFE-coated cookware releases various gases and chemicals that present mild to severe toxicity.” As you can see below and at 2:38 in my video, different gases are released at different temperatures, and their toxic effects have been documented. You’ve heard of “canaries in the coal mine”? This is more like “canaries in the kitchen, as cooking with Teflon cookware is well known to kill pet birds,” and Teflon-coated heat lamp bulbs can wipe out half a flock of chickens. “Apart from the gases released during heating the cooking pans, the coating itself starts damaging after a certain period. Some of the Teflon can start chipping off and make its way into the food It is normally advised to use slow heating when cooking in Teflon-coated pans,” but you can imagine how consumers might ignore that. And, if you aren’t careful, some of the Teflon can start chipping off and make its way into the food, though the effects of ingestion are unknown. I could find only one study that looks at the potential human health effects of cooking with nonstick pots and pans. Researchers found that the use of nonstick cookware was associated with about a 50 percent increased risk of colorectal cancer, but that may be because of what they were cooking. “Non-stick cookware is used in hazardous cooking methods (i.e. broiling, frying, grilling or barbecuing) at high temperatures mainly for meat, poultry or fish,” in which carcinogenic heterocyclic amines (HCA) are formed from the animal protein. Then, the animal fat can produce another class of carcinogens called polycyclic aromatic hydrocarbons (PAH). Though it’s possible it was the Teflon itself, which contains suspected carcinogens like that C8 compound from the movie Dark Waters, also known as PFOA, perfluorooctanoic acid. “Due to toxicity concerns, PFOA has been replaced with other chemicals such as GenX, but these new alternatives are also suspected to have similar toxicity.” We’ve already so contaminated the Earth with it, though, that we can get it prepackaged in food before it’s even cooked, particularly in dairy products, fish, and other meat; now, “meat is the main source of human exposure” to these toxic pollutants. Of those, seafood is the worst. In a study of diets from around the world, fish and other seafood were “major contributors” of the perfluoroalkyl substances, as expected, given that everything eventually flows into the sea. Though the aquatic food chain is the “primary transfer mechanism” for these toxins into the human diet, “food stored or prepared in greaseproof packaging materials,” like microwave popcorn, may also be a source. In 2019, Oral-B Glide dental floss was tested. Six out of 18 dental floss products researchers tested showed evidence of Teflon-type compounds. Did those who used those kinds of floss end up with higher levels in their bloodstream? Yes, apparently so. Higher levels of perfluorohexanesulfonic acid were found in Oral-B Glide flossers, as you can see below and at 5:28 in my video. There are a lot of environmental exposures in the modern world we can’t avoid, but we shouldn’t make things worse by adding them to consumer products. At least we have some power to “lower [our] personal exposure to these harmful chemicals.” This is the second in a three-video series on cookware. The first was Are Aluminum Pots, Bottles, and Foil Safe?, and the next is Are Melamine Dishes and Polyamide Plastic Utensils Safe?. What about pressure cooking? I covered that in Does Pressure Cooking Preserve Nutrients?. So, what is the safest way to prepare meat? See Carcinogens in Meat. Key Takeaways While concerns exist about nickel and chromium leaching from stainless steel cookware, these typically diminish with use. Stainless steel is generally considered safe for cooking, even for those sensitive to these metals. Cooking with cast iron can increase iron intake, potentially benefiting iron-deficiency anemia. However, frying in cast iron can lead to the formation of trans fats. Teflon (PTFE) coating in nonstick cookware has raised health concerns due to the release of toxic gases and chemicals at normal cooking temperatures. Prolonged use or overheating can damage the coating, leading to ingestion of Teflon particles. Research suggests a potential link between the use of nonstick cookware and an increased risk of colorectal cancer, possibly due to the cooking methods used with these pans and the formation of carcinogens. Chemicals like PFOA, used in nonstick coatings, have widespread environmental contamination, affecting food sources like seafood. Meat is the main source of human exposure to these toxic pollutants. Additionally, consumer products like dental floss may contain similar compounds, contributing to personal exposure. To read the original article click here.

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Can We Safely Use Aluminum Foil, Bottles, and Pots?

The AHA! Team — Mon, 11 Nov 2024 06:39:34 +0000

Michael Greger M.D. FACLM via Nutrition Facts – DNA damage is assessed in users of aluminum cookware. “Over the last decades, the toxicity of aluminum for humans has been heavily discussed and is still not completely clarified.” Those occupationally exposed to aluminum—for instance, in smelter plants—suffer from oxidative stress and free radicals that can damage their DNA. What about just using aluminum cookware? Articles like “Metal Exposures from Aluminum Cookware: An Unrecognized Public Health Risk in Developing Countries,” suggesting an “unrecognized public health risk,” were limited to the developing world where “cookware is made in informal shops by casting liquid aluminum melted from a collection of scrap metal,” including the likes of vehicle radiators, lead batteries, and computer parts, which is how you can get so much lead leaching into people’s food. Then “The Relationship Between Plasma Aluminum Content, Lymphocyte DNA Damage, and Oxidative Status in Persons Using Aluminum Containers and Utensils Daily” was published, suggesting that aluminum itself may be harmful. Most of our aluminum exposure comes from processed junk food containing aluminum additives, “including those within some processed cheeses, baking powders, cake mixes, frozen dough, and pancake mixes.” However, about 20 percent of the daily intake of aluminum may come from aluminum cooking utensils, such as “pans, pots, kettles, and trays.” Might this cause a problem? Researchers took blood from consumers who used aluminum cookware versus those who did not and found that not only did the aluminum users have twice the level of aluminum in their blood, as you can see below and at 1:33 in my video Are Aluminum Pots, Bottles, and Foil Safe?, but they had more free radical damage of their body fats and proteins. What’s more, the total antioxidant capacity of the bloodstream of those using aluminum cookware was compromised, so they suffered significantly more DNA damage. Indeed, as you can see below and at 1:52 in my video, those with the highest levels of aluminum in their blood tended to suffer significantly more damage to their DNA. No surprise, since “aluminum is considered to be a pro-oxidant agent.” These folks weren’t just casually using aluminum pots, though. Specifically, they use them every day to cook and store acidic foods, like yogurt and tomato sauce, which can leach out more aluminum. But, even using “camping dishes,” which tend to be aluminum since it’s so light, for just one week, could greatly exceed the tolerable weekly intake guidelines, especially for children, if you incorporated something acidic, like marinating a fresh catch in lemon juice. Once in a while won’t make much difference, but these findings suggest that you may not want to cook in aluminum day in and day out. What about aluminum drinking bottles? They’re nice and light, but children drinking two cups a day of tea or juice from them could exceed the tolerable aluminum exposure limit. So, out of an abundance of caution, safety authorities like the German Federal Institute for Risk Assessment “recommend that consumers avoid the use of aluminum pots or dishes for acidic or salted foodstuffs such as apple sauce, rhubarb, tomato puree, or salt herring…thus prophylactically avoiding the ‘unnecessary ingestion’ of aluminum.” What about aluminum foil? Wrapping and baking food in aluminum foil is a common culinary practice. The concern is that this could represent “a potentially hazardous source of aluminum in the human diet.” When put to the test, there was leakage of aluminum from the foil to the food, but the amount was so small that it would be more of an issue for small children or those suffering from diminished kidney function. What about just wrapping food in foil to store it in the refrigerator? Only marginal increases in aluminum are seen—except when the food is in contact with the foil and, at the same time, certain other types of metal, such as stainless steel, which is largely iron. That sets up a battery and “can lead to tremendous food aluminum concentrations.” For example, as you can see below and at 4:34 in my video, the aluminum levels in a ham before and after a day covered in foil are negligible; there’s hardly a bump in the foil-covered ham. But, if that same foil-wrapped ham sits on top of a steel tray or serving plate for a day, the aluminum levels in the ham shoot up. Finally, you know how aluminum foil is often glossy on one side and dull on the other? Which would be worse? Fish fillets were baked and grilled both ways, wrapped with the glossy side out versus the dull side out, and no significant difference was found. This is the first in a series of three videos on cookware. Stay tuned for Stainless Steel or Cast Iron: Which Cookware Is Best? Is Teflon Safe? and Are Melamine Dishes and Polyamide Plastic Utensils Safe?. I’ve discussed aluminum in antiperspirants, food, medications, and tea. Check out the related posts. Key Takeaways Those working in industries involving aluminum, like smelter plants, face oxidative stress and DNA damage due to exposure to aluminum, which can be detrimental to their health. The use of aluminum cookware, especially in developing countries where it’s often made from scrap metal containing contaminants like lead, can lead to significant aluminum leaching into food, posing a potential health risk. Regular use of aluminum cookware correlates with elevated aluminum levels in the blood, increased free radical damage to body fats and proteins, compromised antioxidant capacity, and higher rates of DNA damage, suggesting potential health hazards. Cooking or storing acidic foods (e.g., tomato sauce or yogurt) in aluminum cookware can exacerbate aluminum leaching, emphasizing the importance of avoiding such practices, particularly for daily use. Besides cookware, processed foods containing aluminum additives contribute significantly to daily aluminum intake. Drinking from aluminum bottles, particularly for children, can also exceed safe exposure limits, prompting cautionary recommendations from safety authorities. To read the original article click here.

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