Heavy Metals in Shark Meat Threaten Fetal and Child Development

The meat of sharks, sometimes consumed as a delicacy in Indonesia, has been found to accumulate heavy metals that could seriously impact fetal and child development, according to scientists. As apex predators in the ocean's food web, sharks consume various fish and marine animals throughout their lives. These prey species absorb pollutants present in the environment, leading to high concentrations of heavy metals such as mercury, arsenic, cadmium, and lead accumulating in sharks' bodies through bioaccumulation. Methylmercury is of particular concern due to its ability to attack the human nervous system. It can easily cross the placenta, directly affecting the fetus when consumed by pregnant mothers. Developing fetuses and children's nervous systems are more vulnerable to these heavy metals compared to healthy adults. Researchers use the Target Hazard Quotient (THQ) to estimate health risks from lifelong heavy metal exposure. While a THQ value below one is generally considered tolerable, some commonly consumed shark species have shown THQ values tens of times above this threshold, leading researchers to advise against their consumption. This issue presents a significant public health challenge in regions where shark consumption is part of the culture or where shark fishing is an economic activity. It highlights the need for accurate information to consumers and a re-evaluation of dietary choices.