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publicado em 10/10/2012 às 14h00:00
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Prenatal exposure to mercury increases the risk of hyperactivity in children

Research also shows that consumption of certain fish during pregnancy may help reduce the risk of behavior problems

 
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A study conducted by experts from Brigham and Women's Hospital, USA, indicates link between exposure to low levels of mercury during the prenatal and increased risk of attention deficit hyperactivity disorder (ADHD) in children.

The survey also found that consumption of fish during pregnancy may help reduce the risk of behavior problems in children. This duality is possible because many types of fish have low levels of mercury, so that you can benefit from food that mercury without affecting the health of mother and baby.

"The research helps highlight that women need to know that the nutrients in fish are good for the brain of a developing fetus, but they need to be aware that high levels of mercury in some fish pose a risk," says researcher Susan Korrick.

Korrick and colleagues followed 400 children born in New Bedford, Massachusetts, between 1993 and 1998. Shortly after their mothers gave birth, the researchers collected hair samples of mothers and analyzed the concentration of mercury. Also, performed a questionnaire to determine maternal fish consumption during pregnancy.

After eight years, the researchers assessed the children and administered standardized tests to determine behaviors related to ADHD.

The researchers found an increased risk of ADHD in children with higher was the level of mercury in the hair of mothers. These mercury levels were below the levels set as potentially hazardous in most previous studies.

Furthermore, they found a reduced risk behaviors related to ADHD in children whose mothers reported eating more than two servings of fish per week, which is a larger number of servings than is currently recommended by the authorities.

The study did not examine which types of fish are best for a pregnant woman to ingest, but previous studies have shown that women should avoid fish that are high in mercury, such as tuna fresh. The fish that are low in mercury, such as salmon and halibut are safer and represent good sources of nutrition.

Source: Isaude.net
   Palavras-chave:   Hyperactivity    Attention deficit    Mercury    Pregnancy    Brigham and Women's Hospital    Susan Korrick   
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