Methylmercury

Organic form of mercury, the most toxic and most bioavailable. Accumulates in the food chain: predatory fish at the top of the chain (tuna, swordfish, shark) contain the highest concentrations. Neurotoxic, particularly dangerous for the development of the foetal and infant brain. ANSES recommends that pregnant women, breastfeeding women and children under 3 strongly limit consumption of predatory fish. (Source: ANSES 2024)