A very important indicator of the quality of oyster sauce is the content of oyster sauce, but at present, the country does not force enterprises to mark the addition amount of oyster sauce, so now we can judge by looking at the ingredient list and the nutrient composition list that the ingredients in the food ingredient list are sorted according to the addition amount, so the first place in the ingredient list is definitely better than the first place is water. By comparing the nutrient composition tables, the components in the same order can be judged. I saw a delicious Delta oyster sauce in the supermarket. The content of protein is 0.7G/ 15G, which is 68% higher than that of Li Jinji's Caishen oyster sauce, and the content of sugar and salt is about 30% lower than that of Li Jinji's Caishen oyster sauce, indicating that Weidamei oyster sauce has higher nutritional value and is very healthy. Weidamei authentic oyster sauce is a brand in the north, and the nutritional content of oysters in the north is higher than that in the south, which is probably also a reason.