|
The Food Standards Agency is advising that pregnant women, women who intend to become pregnant, infants and children under 16 years of age should avoid eating shark, swordfish and marlin.
This interim advice is being issued as a precautionary step following a Food Standards Agency survey that revealed relatively high levels of mercury in these species of fish. Large predator fish such as shark, swordfish and marlin can contain relatively high levels of mercury in the form of methyl mercury, which can harm the nervous system of an unborn child if the fish is eaten regularly by its mother. Infants and children may also be at greater risk from mercury poisoning because they eat more food relative to their body size in comparison with adults.
Occasional consumption of shark, swordfish or marlin as part of a balanced diet by any other adults is unlikely to result in harmful effects. However, on a precautionary basis, they are advised against eating more than one portion each week of either shark or swordfish or marlin.
The Food Standards Agency surveyed 336 fresh, frozen and processed sea fish and shellfish for mercury content, including trout, salmon, tuna, halibut, hoki, seabass, lobster, mussels and prawns. Levels of mercury in fish other than shark, swordfish and marlin did not give cause for concern. Previous UK surveys have not found mercury at levels that cause concern in the UK's most frequently consumed fish – cod, haddock and plaice.
1506 tonnes of shark and swordfish were consumed in the UK in 2001 compared with 244,366 tonnes of cod and haddock.
The Food Standards Agency's general advice on fish consumption is to eat two portions of fish a week, one of which should be oily, as part of a balanced and varied diet. This advice is based on the recommendation of the Committee on Medical Aspects of Food Policy (COMA) which found that this level of fish consumption resulted in a significant reduction in the risk of heart attacks. On average, UK consumers eat only three quarters of a portion of white fish and one quarter of a portion of oily fish a week.
The independent expert Committee on Toxicity of Chemicals in Food, Consumer Products and the Environment (COT) will consider the survey results and any implications for consumers at its June meeting. When the COT has completed its considerations, any further advice will be issued if necessary.
The Food Standards Agency recommendations on a balanced diet can be found at
http://www.food.gov.uk/healthiereating/dailydiet/
|
