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Microplastics are everywhere, including clothing made of synthetic fabrics like polyester, nylon, and spandex, which shed microplastics when worn and washed. A 2023 study found microplastics in 80% of human blood samples, and another study linked them to a 4.5 times higher risk of heart disease and stroke. Microplastics have also been found in lungs, brain tissue (at 10x higher levels in dementia patients), testosterone and semen (linked to lower fertility), and even placentas and breast milk.
Nike, Adidas, and Fabletics use high percentages of polyester in their training wear, leading to microplastic exposure through skin absorption during workouts and release into the water supply during washing. The speaker switched to organic cotton and merino wool clothing. They developed an at-home microplastics test to measure levels in the body. To reduce exposure, check clothing tags, replace synthetic training gear, filter water (as unfiltered tap water contains over 100,000 microplastic particles per year), and avoid plastic food containers and cookware.