1. Look at the appearance: When judging whether the soy sauce has deteriorated, you can look at the appearance of the soy sauce. If white floating objects appear in the upper layer of the bottle, it means that this soy sauce has deteriorated and produced a large number of bacteria, which are no longer suitable for people to eat, otherwise these bacteria will enter the human body and endanger human health.
2. Taste: When judging whether the soy sauce has gone bad, you can take a sip and have a taste. Long soy sauce without deterioration will have attractive sauce flavor and taste slightly sweet and salty. After soy sauce goes bad, the taste will also change. If you find that the taste of soy sauce is a little sour when you taste it, it proves that soy sauce has gone bad and you can't continue to eat it.
3, look at the texture: high-quality soy sauce without deterioration is a black-red liquid substance close to black. Pour it evenly into the bowl and shake it gently, so as not to stick to the bowl wall, and you can see the obvious red color. If soy sauce goes bad, it will be found that its texture is turbid, and obvious residues can be seen on the wall of the bowl when it is poured into the bowl to watch.
Extended data
Soy sauce contains a variety of vitamins and minerals, which can lower human cholesterol, reduce the incidence of cardiovascular diseases and reduce the harm of free radicals to human body. When cooking food, adding a certain amount of soy sauce can increase the flavor of food, make its color look better, and thus increase appetite.
The root cause of the worm phenomenon in soy sauce lies in the "viviparous" reproduction mode of the sauce fly, which can directly produce larvae. It is generally suspected that soy sauce itself carries fly eggs and hatches adults, which is impossible. Consumers generally complain that there are bugs in soy sauce, which only occurs during the use of soy sauce after opening.
When taking Youjiangning and stuffy cola to treat cardiovascular diseases and gastrointestinal diseases, you should not dip it in soy sauce, otherwise it will cause side effects such as nausea and vomiting.
Baidu Encyclopedia-Soy Sauce (China Traditional Condiment)