Tiny plastic particles have been found in the placenta and might be messing with important parts inside cells, which could lead to stress in the body and increase the risk of diseases like diabetes and heart problems.

What we've found so far is limited, but the evidence we’ve reviewed suggests microplastics in the placenta might interfere with cell function in ways that could contribute to long-term health risks like diabetes and heart disease [1]. Our analysis of the available research shows that tiny plastic particles have been detected in placental tissue, and there is some indication these particles may disrupt key cellular components [1]. This disruption could potentially trigger stress responses in the body, which are linked to the development of chronic conditions including diabetes and heart-related issues [1]. However, this is based on a single line of evidence, and we have not found any studies that directly test whether microplastics in the placenta lead to these diseases. Right now, the evidence we’ve reviewed leans toward a possible biological mechanism—meaning there’s a plausible way microplastics could cause harm at the cellular level—but we don’t have enough data to say whether this actually leads to disease in people. There are no studies refuting the idea, but absence of refutation isn’t the same as support. We also don’t yet know how much exposure is needed, or whether the body can clear these particles before damage occurs. Because this area is so new, our current analysis is based on very limited information. In everyday terms: while we can’t say microplastics in the placenta lead to diabetes or heart disease, the early evidence we’ve seen raises questions worth taking seriously. Until we know more, it’s reasonable to consider reducing plastic exposure where possible, especially during pregnancy.