The delicious and inviting salty fish, essentially containing nitrosamines, is a carcinogen (a cancer-triggering substance). Substance carcinogen is produced in the process of manufacture. As is known, the process of making it by way of salt (salted) and then dried in the sun, to dry and so more durable and resistant stored for long periods of time.
Unfortunately, in the process of marinating and drying, sunlight reacts to the nitrite substance produced by fish meat, then forming nitrosamine compounds. Finally, the frequency of eating salted fish for a long time can trigger nasopharyngeal cancer (throat cancer or ENT), especially if your immune system is low.