Fish can provide you with a ton of amazing health benefits. For example, most fatty fish contains omega-3 fatty acids, which are known to help lower risk of heart disease and aid in cognitive health.
The omega-3s in fish can also lower someone's risk for depression and help improve mental health.
Consumer Reports (CR) recently released a report where they looked into the levels of mercury, a neurotoxin, contained in five different brands of tuna: Wild Planet, Bumble Bee, StarKist, Chicken of the Sea, and Safe Catch.
They found that all five brands contained levels of mercury in their tuna, but on average, albacore varieties across all the brands had three times more mercury than light or skipjack.
According to Consumer Reports, you can't really consume seafood without also consuming some levels of mercury.
According to the EPA, mercury is considered a neurotoxin that can have negative health side effects if consumed in larger quantities—such as loss of brain cells and motor skills, worsened memory, feelings of anxiety, and an increased risk of heart disease.
The FDA claims that adults should be fine with lower-mercury fish around once or twice a week.
It's important to remember that anytime you consume seafood, you're more than likely putting some level of mercury into your body.