When it comes to fat, there’s one type you don’t want to cut back on: omega-3 fatty acids. Two crucial ones -- EPA and DHA -- are primarily found in certain fish. ALA, another omega-3 fatty acid, is found in plant sources such as nuts and seeds. Not only does your body need these fatty acids to function, but also they deliver some big health benefits.

Because essential fatty acids (ALA, DHA, EPA) are not made in the body, you need to get them from your diet.