Microplastics, tiny fragments of plastic that can be smaller than a grain of sand, are increasingly found in many parts of the environment and in the human body. Recent research has drawn attention to their prevalence and possible health effects.
Microplastics originate from two main sources. Primary microplastics are intentionally manufactured for use in products such as cosmetics, fabrics, household cleaners, building materials, furniture, clothing, sunscreen, pesticides, food containers, bottles, paint, personal care items and medications. Secondary microplastics result from the breakdown of larger plastic items.
Studies have detected microplastics in soil, air, streams, rivers, lakes and oceans. They have also been found in both whole and processed foods as well as throughout human bodies.
A study published by University of New Mexico researchers in Nature earlier this year reported increased accumulations of microplastics in human tissues since 2016. The study noted higher concentrations particularly in the brains of individuals diagnosed with dementia. However, researchers stated that causation has not been established.
Addressing recent claims about the amount of microplastics present in the brain, experts clarified that the study estimated an adult brain may contain up to 7 grams of microplastics—the weight equivalent to a disposable plastic spoon—not a teaspoonful by volume.
“Despite their tiny size, microplastics can produce adverse health effects. These include inflammation and oxidative stress, and possible links to heart and circulatory problems, autoimmune disorders, certain cancers and reproductive problems in both women and men,” according to UCLA Health experts.
They added: “The presence of any amount of plastic in the delicate and complex tissues of the brain is worrisome.”
UCLA Health encourages individuals seeking more information or concerned about exposure to consult their healthcare provider or visit their online booking options for appointments.
