Mercury

Mercury is a heavy metal found in various chemical forms. The most toxic form is organic mercury, also known as methylmercury.

Mercury occurs naturally in the environment from sources such as volcanic eruptions and degassing. Human activities such as mining and industry also lead to mercury emissions.

Methylmercury is passed from the mother to her baby during pregnancy, and large quantities of it can cause deformities in the child. It also affects the mental development of both foetuses and infants, and may reduce learning ability and negatively affect fine motor skills.

Fish and other seafood, and particularly lean fish, is currently the main source of mercury in our diet.