While this isn't exactly a popular western dish, anyone from regions of East and Southeast Asia will know what we're talking about here. Originally from China, salted fish is typically dried cod fish, which has been preserved with a lot of salt. Unfortunately for lovers of this flavorsome dish, it's not exactly good for you. Something happens during the steaming process, which causes toxic compounds to form.
These compounds are highly carcinogenic and have been known to increase the risk of cancer. Specifically, nasopharyngeal cancer, which is generally found in the upper throat, just behind the nose. This doesn't mean you can never enjoy salted fish again. It just means that you should definitely only eat it in moderation. Thankfully, there are plenty of other ways to enjoy fish. You could even just grill up a piece of cod and add salt.