Mercury is released into the water from industrial sources burning fossil fuels and solid wastes. “Nearly all fish contains a small amount of mercury, but contamination becomes a problem when high levels accumulate,” says certified nutritionist and dietician Janet Brill, Ph.D., R.D., L.D.N. “Exposure to too much mercury can damage the nervous system and up your risk of dying from heart disease.”
PCBs are chlorinated chemicals that were outlawed in the ‘70s, but since they don’t break down easily, they’re still pervasive in our waters. “Exposure to PCB is associated with a greater risk of neuropsychological impairment,” says Smith. “People over 50 who consume fish contaminated with PBC have a greater risk of decline in memory and increase in depression, which can adversely affect physical health and ability to function.” That said, experts in the health community continue to debate the harmful effects of PCBs, some taking the stance that the levels at which we ingest them are too low to be worrisome.
Without further ado, here are the eight worst fish you can eat >>