"Based on the FDA's test results and the guidelines for acceptable levels of exposure to mercury set out by the Environmental Protection Agency (EPA), we believe that it's prudent for pregnant women to avoid canned tuna and for young children and women of childbearing age to limit consumption. Exposure to mercury from fish can result in small but measurable impairments in the neurological system, including such problems as eye-hand coordination and learning ability," says Dr. Marvin M. Lipman, Consumer Reports' Chief Medical Adviser.

"Fortunately, there is a wide variety of low-mercury seafood options that everyone can eat frequently as part of a healthy diet. Fish is an important source of protein and contains heart- protecting omega-3 fatty acids," adds Dr. Lipman.

In light of FDA's posted data and the EPA's reference dose for mercury in fish, CR's experts offer advice for the following groups of people: