Many grease-resistant fast- A new study says food packaging and boxes contain potentially harmful chemicals that penetrate into food. Tests of more than 400 samples from restaurants across the country show that nearly half of fast- Lead researcher Laurel shidel said that one of the food wrappers and five cardboard food boxes contained detectable fluorine. She is an environmental chemist at Newton Silent Spring Institute in Massachusetts. Previous studies have already put some fluorine chemicals such as total fluorine acid (PFOA) And all fluorine bitterness (PFOS) Kidney and testosterone cancer, low birth weight, thyroid disease, loss of sperm quality, pregnancy The study authors said in background notes that hypertension and immune system problems in children were induced. Shooting at momigiña beach in Connecticut protesters interrupt Harris major United StatesS. Since 2011, manufacturers have voluntarily eliminated PFOA and PFOS for most uses, but they are still being produced in other countries. The results of these studies suggest that fluorine chemicals remain widespread in food packaging, the authors say. \"One of the challenges of avoiding exposure is that you can\'t judge by looking at whether the package contains fluorine,\" says Schaider . \". \"We can choose not to buy stains -- Dirt resistant carpet or stain Wear-resistant coating on our furniture. But for consumers, it is difficult to choose food packaging that does not contain fluorine chemicals. \"As a category, fluorine chemicals are called Fluorine-containing substances (PFASs). They are widely used in a variety of products, including carpets, upholstery, floor wax, and outdoor clothing, the study authors say. Some fast- Food packaging is treated with PFASs to grease wrapping paper and boxes- He is very resistant, says Schneider. It has been found that PFASs can penetrate into food from packaging, says Schneider. Heat and grease seem to help chemicals migrate to food, she added. According to the food service packaging Institute, there is only \"short- Chain \"fluorine chemicals are still fast-food packaging. The “short- The United States has conducted a rigorous review of chain \"chemicals\"S. The Food and Drug Administration found their intended use safe, \"The industry group said in a statement. PFOA and PFOS are \"long term The Institute says \"chain\" chemicals have been phased out. \"Today\'s food service packaging is no longer long- Chain \'fluorine chemicals, but use FDA-Short approval \"There is no chain \'fluorine chemicals of any fluorine chemicals, or even newer barrier coatings,\" the organization added . \". For the new study, the researchers said that they are from 27 fast- Food chain in five metropolitan areas of the United States. They use particles. induced gamma-ray emission (PIGE) The fluorine in the sample was analyzed by means of spectral analysis, says Schaider. \"Paper usually does not contain too much fluorine, so we infer that this will be a way to detect the presence of PFASs,\" says Schader . \". The team said they found that 46% of food items such as pizza and chips were packaged in paper and 20% of the cardboard box samples contained fluorine. The team also tested paper cups for hot and cold drinks but found no significant fluoride content. Paper packaging samples containing fluorine chemicals range from about 38% of sandwich/burger packaging to about 57% of packaging for desserts, breads and Tex The authors of the study said Mexican food. To verify their analysis, the researchers conducted a more detailed study of a subset of 20 samples, Schaider said. Generally, samples with high fluorine also contain PFASs. Six of them also contain long samples. Although this chemical is no longer widely used due to health hazards, the chain PFOA. PFOA may exist in these wrapping paper because recycled paper is used to make Indicates how difficult it is to remove these chemicals from the environment. Research shows that PFASs in consumer goods accumulates in landfill sites and can migrate to groundwater, says Schader. Fluorine-containing chemicals are also allowed in packaged foods. \"It seems incompatible to make these chemicals never break down into paper that we want to compost,\" says Schaider . \". People pay special attention to long-standing problems A chemical exposure expert who did not participate in the study said the long-term effects of these chemicals on children. Fluoride chemicals were found in cord blood, suggesting that the fetus was exposed to PFASs. Kenneth Spaeth, head of health, occupational and environmental medicine, greater neck NorthwellY. About 1-third of U. S. The study authors point out that children eat fast food every day. \"Chemicals like this, exposure starts in the womb, and once we are born into childhood and adulthood, exposure continues,\" Spaeth said . \". \"It has a real potential impact on our health. Spaeth added: \"It is unlikely that PFASs will be removed from the product through new regulations. Instead, he suggested that public pressure be used as a means of future change. \"A lot of products become BPA- \"It\'s free, not because they\'re forced to do it, but because of public attention and strong public protests,\" he said . \" Imitating chemicals used in plastic \"I don\'t think this will happen if consumers are waiting for public supervision. The study was published in February. First place in the Journal of Environmental Science and Technology.