Do washing machines release microfibers that can harm your health?

What's actually in it

Every time you run a load of laundry, your washing machine sheds tiny microfibers from your clothes. These fibers come from synthetic fabrics like polyester, nylon, and acrylic. They are so small that they become airborne and mix into the air you breathe at home.

These are not harmless bits of lint. They are plastic particles small enough to reach deep into your lungs. If you dry clothes indoors or near open living areas, the concentration of these fibers in your home air increases significantly.

What the research says

A 2026 study in Environ Res found that repeated airway exposure to washing-machine lint microfibers causes lung inflammation. The study showed these fibers interfere with the lungs' natural cleaning process, potentially leading to lasting cellular damage. This is the same type of fiber released during every laundry cycle.

The impact goes beyond the lungs. A 2026 study in Ecotoxicol Environ Saf found that microplastics drive changes in immune cell function and fat metabolism, triggering allergic airway inflammation. This means the fibers from your laundry are not just a physical irritant. They can activate your immune system in ways that lead to allergic reactions and breathing problems.

The broader chemical picture also matters. A 2026 study in Ecotoxicol Environ Saf found that combined exposure to persistent organic pollutants and endocrine-disrupting chemicals raises the risk of thyroid disease. Many of these chemicals cling to microfibers, making laundry lint a vehicle for delivering pollutants deep into your body.