Leaving plastic water bottles in a hot car can cause them to shed billions of microplastic particles into the water
A 2023 study found heat and UV light drastically accelerate plastic breakdown compared to refrigerated storage
A 2014 University of Florida study called similar results a worst-case scenario for human consumption
Even cold beverages contain microplastics, though hot drinks like tea and coffee carry the highest concentrations
Experts recommend switching to glass or stainless steel bottles and keeping plastic bottles away from heat and sunlight
A growing body of research confirms what many health experts have quietly warned about: leaving plastic water bottles in a hot car causes them to shed billions of microscopic plastic particles into the water you drink. Scientists at multiple universities have found that heat and ultraviolet light accelerate the breakdown of common bottle plastics, releasing tiny fragments known as microplastics into the liquid inside.
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