Microplastics – The Health Care Blog

Microplastics Are Here, There, Everywhere

Jun 25, 2025

By KIM BELLARD

Vaccine experts are going rogue in response to RFK Jr’s attacks on vaccine safety. Health insurers promise – honest…this time – to make prior authorizations less burdensome (although not, of course, to eliminate them). ChatGPT and other LLMs may be making us worse at learning. So many things to write about, but I find myself wanting to return to a now-familiar topic: microplastics.

I first wrote about microplastics in 2020, and subsequent findings caused me to write again about their dangers at least once a year since. Now there are, yet again, new findings, and, nope, the news is still not good.

A new study, from researchers at the Food Packaging Forum, Swiss Federal Institute of Aquatic Science and Technology (Eawag) and the Norwegian University of Science and Technology, and published in npj Science of Food reviewed 103 previous studies about the impact food packaging and “food contact articles (FCAs)” can have on micro- and nanoplastics (MNPs) in our food. They found that even normal use — such as opening a plastic bottle, steeping a plastic tea bag, or chopping on a plastic cutting board – can contaminate foodstuffs.

“This is the first systematic evidence map to investigate the role of the normal and intended use of food contact articles in the contamination of foodstuffs with MNPs,” explains Dr. Lisa Zimmermann, lead author and Scientific Communication Officer at the Food Packaging Forum. “Food contact articles are a relevant source of MNPs in foodstuffs; however, their contribution to human MNP exposure is underappreciated.”

Their collected data are freely accessible through the FCMiNo dashboard., which allows users to filter included data by the type of FCA, the main food contact material, the medium analyzed, and whether MNPs were detected, and if so, for their size and polymer type.

Removing the plastic from items you purchase at the grocery store may contaminate it with microplastics, as might steeping a tea bag. Simply opening jars or bottles of milk can as well, and repeated opening and closing of either glass or plastic bottles sheds “untold amounts” of micro- and nanoplastics into the beverage, according to Dr. Zimmerman, who further noted: “The research shows the number of microplastics increases with each bottle opening, so therefore we can say it’s the usage of the food contact article which leads to micro- and nanoplastic release,”

Dr. Zimmerman told The Washington Post: “Plastic is present everywhere. We need to know what we can do.” Examples of what she suggests we can try to do include avoiding storing food in plastic whenever possible and avoiding heating plastic containers. She admitted, though: “We have not really understood all the factors that can lead to the release of micro and nanoplastics.”

Microplastics, Major Problem

Mar 19, 2024

By KIM BELLARD

It’s been almost four years since I first wrote about microplastics; long story short, they’re everywhere. In the ground, in the oceans (even at the very bottom), in the atmosphere. More to the point, they’re in the air you breathe and in the food you eat. They’re in you, and no one thinks that is a good thing. But we’re only starting to understand the harm they cause.

The Washington Post recently reported:

Scientists have found microplastics — or their tinier cousins, nanoplastics — embedded in the human placenta, in blood, in the heart and in the liver and bowels. In one recent study, microplastics were found in every single one of 62 placentas studied; in another, they were found in every artery studied.

One 2019 study estimated “annual microplastics consumption ranges from 39,000 to 52,000 particles depending on age and sex. These estimates increase to 74,000 and 121,000 when inhalation is considered.” A more recent study estimated that a single liter of bottled water may include 370,000 nanoplastic particles. “It’s sobering at the very least, if not very concerning,” Pankaj Pasricha, MD, MBBS, chair of the department of medicine at the Mayo Clinic, who was not involved with the new research, told Health.

But we still don’t have a good sense of exactly what harm they cause. “I hate to say it, but we’re still at the beginning,” Phoebe Stapleton,a professor of pharmacology and toxicology at Rutgers University, told WaPo.

A new study sheds some light – and it is not good. It found that people with microplastics in their heart were at higher risk of heart attack, stroke, and death. The researchers looked at the carotid plaque from patients who were having it removed and found 60% of them had microplastics and/or nanoplastics. They followed patients for three years to determine the impacts on patients’ health and found higher morbidity/mortality.

“We are reasonably sure that the problem comes from a frailty of the plaque itself,” says Giuseppe Paolisso, a professor of internal medicine and geriatrics at the University of Campania Luigi Vanvitelli in Naples, Italy, and one of the study’s authors. “We suppose due to the fact that the plaques with microplastics and nanoplastics have a higher degree of inflammation, this kind of plaque can be broken more easily; and once they are broken, they can go into the blood streams.”

“This is pivotal,” Philip Landrigan, an epidemiologist and professor of biology at Boston College, who was not involved in the study, wrote in an accompanying opinion piece. “For so long, people have been saying these things are in our bodies, but we don’t know what they do.” He went on to add: “If they can get into the heart, why not into the brain, the nervous system? What about the impacts on dementia or other chronic neurological diseases?”

Scary stuff.

If that isn’t scary enough, an article last year in PNAS found: “Indeed, it turns out that a host of potentially infectious disease agents can live on microplastics, including parasites, bacteria, fungi, and viruses.” Even worse: “Beyond their potential for direct delivery of infectious agents, there’s also growing evidence that microplastics can alter the conditions for disease transmission. That could mean exacerbating existing threats by fostering resistant pathogens and modifying immune responses to leave hosts more susceptible.”

However much you’re worrying about microplastics, it’s not enough.