Unfortunately mercury poisoning
is very common these days & some of my clients have it from fish alone...especially canned tuna, rather than their mercury fillings.
The list below shows the amount of various types of fish that a woman who is pregnant or planning to become pregnant can safely eat, according to the Environmental Protection Agency. People with small children who want to use the list as a guide should reduce portion sizes. Adult men, and women who are not planning to become pregnant, are less at risk from mercury exposure but may wish to refer to the list for low-mercury choices.
LEAST AMOUNT OF MERCURY
Fish to enjoy:
Mackerel (N. Atlantic, Chub)
MODERATE AMOUNT OF MERCURY
Eat six servings or less per month:
Bass (Striped, Black)
Croaker (White Pacific)
Tuna (Canned, chunk light)
Weakfish (Sea Trout)
HIGH AMOUNT OF MERCURY
Eat three servings or less per month:
Mackerel (Spanish, Gulf)
Sea Bass (Chilean)*
Tuna (Canned Albacore)
HIGHEST AMOUNT OF MERCURY
Tuna (Bigeye, Ahi)*
* Fish in Trouble! These fish are perilously low in numbers or are caught using environmentally destructive methods. To learn more, see the Monterey Bay Aquarium and the Blue Ocean Institute, both of which provide guides to fish to enjoy or avoid on the basis of environmental factors.
** Farmed Salmon may contain PCB's, chemicals with serious long-term health effects.
Sources for NRDC's guide: The data for this guide to mercury in fish comes from two federal agencies: the Food and Drug Administration, which tests fish for mercury, and the Environmental Protection Agency, which determines mercury levels that it considers safe for women of childbearing age. http://www.nrdc.org/health/effects/mercury/guide.asp
About the mercury-level categories: The categories on the list (least mercury to highest mercury) are determined according to the following mercury levels in the flesh of tested fish.
Least mercury: Less than 0.09 parts per million
Moderate mercury: From 0.09 to 0.29 parts per million
High mercury: From 0.3 to 0.49 parts per million
Highest mercury: More than .5 parts per million