Researchers found evidence of the chemical, which is used to make plastics more flexible, in 29 of the 30 products.
According to Food and Drug Administration spokeswoman Megan McSeveney, for a phthalate to be used in food packaging, "there must be sufficient scientific information to demonstrate the substance is safe under the intended conditions of use".
According to latest reports, Mac and Cheese powder have tested positive for toxic Phthalate, which are said to be gender altering chemicals.
The study was published by the Coalition for Safer Food Processing and Packaging, a group of consumers, doctors, scientists, and health advocates.
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The U.S. government phthalates from children's teething rings and rubber duck toys a decade ago.
The chemicals, known as phthalates, are used in hundreds of products, foods, and drinks and have been linked to serious health complications. Chocolate, French Fries, Cheese: Top 5 highly addictive food products we have been eating for a long time now! The samples were sent to an independent lab in Belgium, where the fats were extracted and tested for 13 different types of phthalates. Mac and cheese have been one of the easy to cook and yummy to eat delicacies, but reports suggest that it might be a curse more than a blessing.
The report which is available online says that "Cheese powder generally had higher levels of phthalate than cheese slices". Nine were Kraft Heinz products. It says more research is needed to assess how phthalates impacts human health.
"The trace amounts that were reported in this limited study are more than 1,000 times lower than levels that scientific authorities have identified as acceptable", the company told TIME. She said that while the chemicals can quickly leave our body - taking as little as several hours, sometimes - the concern is the constant exposure we have to them from plastics to food, which can be particularly concerning for pregnant women. The petition was launched in hopes that America's biggest cheese brand removes all sources of the chemical from their products.