Toxic chemicals linked to infertility found in Big Macs and Taco Bell burritos
Researchers tested burgers, burritos, and pizza from six top fast food chains in the US for various chemicals. They found toxins in 80% of samples.
In a recent study, Edwards and colleagues ordered from six of the most popular fast food chains in the US — McDonald's, Burger King, Pizza Hut, Domino's, Taco Bell, and Chipotle — and tested samples of the food for 11 plasticizing chemicals.
More than 80% of samples contained known phthalates, a class of chemicals used to make plastic softer and more flexible. Phthalates and other plasticizers are commonly found in food packaging and gloves, despite their known effects on human health.
Past studies have found people who reported eating more fast foods had higher levels of phthalates in their urine, but this is the first effort to test the food itself with a new generation of plasticizers in mind.
Phthalates have been linked to reproductive problems and early death
Several phthalates have been found to interfere with hormone function, which can lead to a cascade of problems with fertility and child development.
People with high levels of phthalates in their urine were also found to be more likely to die early, especially due to heart disease, in a recent study.
While one Big Mac probably won't kill you, it's important to consider your phthalates exposure overall, Edwards said. Exposures in food can build on other sources of chemicals, like cosmetics and cleaning products.
"While they don't build up in your body the way that PFAS chemicals do, you still are being constantly exposed to these phthalates from multiple sources," Edwards told Insider.
Since the chemicals have been linked to adverse health effects, the Consumer Product Safety Commission banned the use of eight phthalates in children's toys and child-care articles in 2017. However, those banned substances are still used in other plastics, and at least four of them were detected in fast foods.
The researchers also tested for a new plasticizer called DEHT, which is used to replace banned phthalates, and found it in 86% of the food tested. Replacement plasticizers like DEHT are not yet well-studied for possible health effects, but the GW team found they "behaved similarly" to ortho-phthalates in terms of acting on hormone receptors.