Has the amount of mercury in canned tuna gone up?
No. Studies find that the amount of mercury in canned tuna has not increased in the last 25 years. In fact, a Princeton University study, funded by EPA, compared mercury concentrations in yellowfin tuna caught off the coast of Hawaii in 1998 with the amount of mercury in yellowfin tuna caught in the same area in 1971. That study found no increase in mercury levels.