Dar seafood ppp standard


Dietary exposure to mercury



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tarix05.01.2022
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Dietary exposure to mercury: During its review of metal contaminants in foods, ANZFA concluded that there is potential for consumers to exceed the PTDI set for mercury, especially from eating marine fish, the main contributor to mercury dietary exposure (ANZFA 1999b).
Dietary modelling conducted as part of that risk assessment determined that the exposure to mercury for the general population from a range of foods is well below the PTDI, at up to 23 per cent for mean consumers and up to 89 per cent for 95th percentile consumers. For adults consuming fish at a median level (70 grams fish/day) every day, the PTDI for adult neurological effects is approached (96% PTDI) assuming all fish is predatory, but not if all fish is non-predatory (30% PTDI). However, for high consumers of fish (adults consuming fish alone at the 95th percentile level – 321 grams fish/day) the PTDI for adult neurological effects is exceeded regardless of whether all fish is predatory (438% PTDI) or non-predatory (137% PTDI).
As a result of that review, ANZFA developed an advisory statement for pregnant women informing them about the amounts and types of fish that are safe to consume during pregnancy, as the foetus is the most vulnerable to the effects from mercury.

However, several factors have led to FSANZ instigating a review of its mercury risk assessment, particularly with regard to fish consumption.


The lowering of the PTWI by JECFA and the availability of a significant amount of recent data on mercury levels in a far greater number of fish species are allowing a complete and thorough revision of the dietary modelling, and the outcomes of this work are expected to lead to a reconsideration of existing risk management options for mercury in foods.

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