Microplastics are the latest health threat. People across the world have been left worried after recent research found that the accumulation of microplastics in the human brain is equivalent to almost a spoonful. Moreover, there is empirical evidence that shows that these tiny plastic particles can breach the blood-brain barrier that protects the brain from harmful substances. Measuring how much plastic is in the body is tricky, so there's a lot of uncertainty in that estimate. But the fact of the matter is that scientists have seen these really small, concerning particles in the body. The question is, how harmful are they, really?What Are Microplastics? What we know is that plastics are all around us. They're in our furniture, our food supply, our clothes, and cosmetics, and they don't really biodegrade. They just get smaller and smaller in the environment. Microplastics are what result from that. These particles are really tiny, less than five millimeters in size. Because they're so small, they can get everywhere—into our soil, air, into the food chain and into our bodies. How Are Microplastics Getting Inside Our Bodies? Researchers at the University of New Mexico found that the primary way these microplastics are getting into our bodies is through ingestion. One notable finding from the lab's research was that the concentration of microplastics in our brains is increasing over time. They showed that from 2016 to 2024, the concentration of microplastics in human brains increased by almost 50%. This increase coincides with the rise of plastic in our world over time. According to some estimates, plastic production doubles every 10 to 15 years. Do People With Dementia Have Higher Concentration Of Microplastics In Thier Brain?One particularly concerning finding was that the brains of people with dementia had even more microplastics in them. This could be because the brains of people with dementia are less able to clear out toxins and have a more porous blood-brain barrier. Scientists are trying to figure out causation. Researchers are also investigating the link between microplastics and other health issues like fertility issues, multiple sclerosis, and heart disease.It will still take years before scientists can actually discover how harmful are microplastics are for our brains. Here are certain things you can do to prevent the threat: One is not drinking from plastic water bottles, especially when they've been out in the sun. Another is not heating food in plastic containers. A third is eating lower on the food chain, so you're not consuming fish and animals that have taken in a lot of microplastics. A lot about plastic production is not in our control. Ultimately, reducing the overall plastic in the world, has to be done at the policy level. However, doing this reporting has really made me aware that if we don't stop our plastic use and waste, it's likely that they will keep accumulating in our bodies.