Health experts caution that drinking water stored in plastic bottles left in vehicles may slowly poison the body over time. Studies show up to 80% of bottled water contains microplastics and other substances linked to adverse health effects, including cancer, fertility issues, and metabolic disorders. Exposure to heat can accelerate the leaching of toxic compounds like antimony and bisphenol-A (BPA) from plastic bottles. One study found these toxins increased with storage temperature, especially above 158°F. Researchers advise against storing plastic water bottles in warm environments, as even moderate heat can release harmful microparticles. Microscopic plastic particles, or nanoplastics, are of particular concern as they can enter the bloodstream and brain. Policymakers and industry are urged to address the public health threat posed by chemical exposure from plastics. (Story URL)