Cod
Cod farming is not all that better than tilapia farming. The fish swim in water full of garbage and eat whatever they find. It goes without saying that eating them would not be good for your health.
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Rice Noodles
Sulfur dioxide is sometimes used to make noodles look fresh. While it might be more pleasant to see, keep in mind that Sulphur dioxide is not only toxic but can cause cancer as well. Yikes.