The tiny plastic bits in processed sea cucumbers are mostly made of a type called polypropylene, and it might stick more strongly to chemicals in the body, making it last longer or react more than other plastics.

What we've found so far suggests that polypropylene is the most common type of microplastic in processed sea cucumbers and may interact more strongly in biological systems [1]. Our analysis of the available evidence shows that the microplastics detected in these products are primarily composed of polypropylene [1]. This type of plastic appears to have a greater tendency to bind with certain chemicals in the body, which could mean it stays longer or triggers stronger reactions compared to other plastics [1]. The evidence we’ve reviewed leans toward the idea that polypropylene is not only dominant in these samples but also potentially more reactive in biological environments [1]. However, we base this on a limited number of assertions—just one detailed claim supported by six points of evidence, with no studies or assertions offering conflicting results [1]. Because of this, our current understanding is narrow, and we can’t yet determine how strong or consistent this pattern is across different samples or conditions. We don’t know enough at this stage to say why polypropylene might behave this way in the body or how significant these interactions are for long-term health. There’s also no data yet on whether processing methods increase polypropylene contamination or how widespread this issue is in other seafood products. Our current analysis shows a clear pattern in the type of microplastic present, but the biological implications remain uncertain. More research would help us better understand the risks, if any, from this specific exposure. Practical takeaway: If you eat processed sea cucumbers regularly, you might be exposed to polypropylene microplastics. We don’t yet know what that means for your health, but it’s reasonable to consider varying your diet to limit repeated exposure to any single source of microplastics.