Generally speaking, fish is a very nutritional food to add to your diet.

Researchers at Wake Forest University School of Medicine said farm-raised tilapia has very low levels of beneficial omega-3 fatty acids.

It also had very high levels of omega-6 fatty acids.

Researchers found tilapia has higher levels of omega-6 fatty acids than 80 percent lean hamburger.

It has more omega-6 fatty acids than doughnuts do and even more than bacon.

Researchers said for people who are eating fish as a method to control inflammatory diseases such as heart disease and arthritis should take tilapia off the table.

Researchers said tilapia is easily farmed using inexpensive corn-based feeds. Because it's cheap to raise them it keeps the price of the fish low.

And experts said that's why tilapia has become a staple in low-income households.