EWG and MPP received extensive media coverage after releasing results measuring mercury hair levels in over 250 women who eat two or more seafood meals per week, the amount EPA/FDA recommend. Testing indicates 29% exceed the EPA guideline for mercury exposure during pregnancy (1 ppm) and 59% exceed a more protective upper limit of 0.58 ppm recommended by scientists. Tuna was a major source of participant’s mercury exposure (40% of estimated ingestion) which is consistent with MPP’s (now updated) analysis, using FDA’s data, which shows tuna accounts for 45% of mercury in the US seafood supply. Notably only 17% of the mercury in participants’ diets was from species identified in EPA/FDA’s draft advice, which is incomplete because it fails to provide enough detail about which mercury-laden species to limit or avoid (i.e. tuna) and which are low in mercury and higher in omega-3s.