How would PFAS exposure be classified given regular consumption of contaminated fish, dairy, and livestock?

• A. Semi-chronic due to regular consumption of contaminated fish, dairy, and livestock.
• B. Acute.
• C. Chronic.
• D. None.

Answer: (A)

Regular dietary intake of PFAS from contaminated foods represents exposure that happens repeatedly over a period of time, not a single event. Acute exposure would mean a one-time or very short-term high-dose event, with rapid onset of effects, which doesn’t fit ongoing eating patterns. Semi-chronic captures repeated exposure over weeks to a few months, so describing regular consumption of contaminated fish, dairy, and livestock as semi-chronic aligns with that intermediate timeframe. PFAS are persistent and can accumulate in the body, so ongoing exposure even at low levels can build up over time, consistent with a non-acute, repeated exposure pattern. If exposure continued for years, it would be described as chronic. In this context, the regular, intermediate-duration exposure makes semi-chronic the most appropriate label.