Mercury is one of the most dangerous environmental pollutants, both in its elemental form and in chemical combination. When mercury is released into environment it gets transformed into methylated mercury through microbial action. The methylation of mercury is a key step in the entrance of mercury in the food chain. Methyl mercury bioaccumulates in fish and enters the human body when the fish is eaten.
The good news is that high concentration of mercury is not uniform across all fish species. So while there might be literally something fishy in your fish curry and rice , there is no need to push the extreme panic button always.
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