The fish sauce from Oyster Brand is made from fermented anchovy. The natural production process is non-mechanised and takes months to complete. The fermentation process mainly requires salt and patience. So the list of ingredients for fish sauce is correspondingly short: fish, salt and a little bit of sugar.
Fish sauce is used in south-east Asia in the same way as salt is used in the West. The sauce does not smell particularly pleasant, but do not let that stop you. Its taste is the secret ingredient in Thai cuisine. A few drops of fish sauce work wonders in a Thai curry, or even a simple bouillon.