Environmental Health News reported today that:
"People who ate enough contaminated fish to raise methylmercury levels in their bodies to levels still considered "safe" had subtle changes to their heart rhythm that may affect their long-term health.
Researchers in Japan have found that eating fish tainted with methylmercury - at levels currently considered safe for human exposure - can lead to a slightly unstable resting heart rate. Over time, these types of changes are associated with an elevated risk of developing coronary heart disease.
Read the report summary here.