I have two important updates on PCBs based on new researches which I read earlier today and feel it is important to share it with readers on my blog. It could be recalled that I made a post on PCBs, January 1st 2011. Enjoy!
1. Salmon farms contaminate wild fish: Salmon farms may be contaminating local wild fish but how much depends on the species, finds a new study that raises another concern about the environmental impacts of salmon farming. The contaminants, including PCBs, DDT and PBDEs, apparently come from pellets fed the farmed fish. Wild fish eat pellets that escape from the salmon pens. The results suggest that eating wild fish that live near salmon farms may also be a concern for human exposure to these contaminants.
2. Link between PCBs and blood pressure broader than suspected: High levels of PCBs in people’s blood may contribute to elevated blood pressures – but not just in those at the high end of exposures, as was previously thought. New findings show that PCBs at low levels could increase blood pressure in healthy people, too. The associations between hypertension and PCBs persisted even after accounting for important risk factors such as age, body mass index (BMI), gender, race, smoking and exercise.
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