General
PFAS Barely Breaks Down, How Can Blood Levels Then Decrease?
Although PFAS persists in the environment, levels in human blood can decrease because substances like PFOS and PFOA leave the body gradually through urine and feces. According to RIVM researcher Joke Herremans, if exposure ceased, blood concentrations would halve in approximately three and a half years. However, continuous intake means it takes time for reduced exposure to become visible in test results. A recent study showed that 71% of adults exceeded health limits, down from 99% previously, though methodological differences prevent confirming a definitive trend. Higher concentrations were observed in specific regions like Zeeuws-Vlaanderen, potentially due to local pollution sources, diet, or demographic factors, though the exact causes remain unverified by this research.
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