Some people say that oyster sauce can be made without oysters. Oysters are all synthetic and harmful to human health, but if you buy oyster sauce produced by regular manufacturers, it is impossible.
You can look at the ingredient list behind oyster sauce, which contains oyster sauce, which is concentrated by adding water to oysters. Speaking of it, the appearance of oyster sauce was actually discovered by accident in the process of cooking oysters. It was found that there was brown viscous liquid in the pot, which tasted very fresh, so it was the later seasoning oyster sauce.
There are various additives in the ingredient list of oyster sauce, so many people feel unhealthy and say it is synthetic oyster sauce.
Simply put, there are other additives besides oyster sauce, such as sodium benzoate, pigment, thickener and so on. Some people think that adding these things is not "pure" and belongs to artificial synthesis. This statement is wrong, because pure oyster sauce can't be stored for a long time, and its taste will be worse. After proper processing, it not only tastes fresher, but also lasts longer.
These things are actually similar to starch. In order to make oyster sauce thicker and more uniform, as long as it is within the scope of national standards, it is safe for the human body.
One of the ingredients you should be familiar with is sodium glutamate, which can also be seen in the ingredient list of monosodium glutamate. The raw material is corn starch, not synthetic. Generally, daily cooking will not exceed 120 degrees, so don't worry about it causing cancer, and it is not a carcinogenic component.
Oyster sauce VS soy sauce:
Both are often used for seasoning, because everyone has different tastes, so the final choice is different. On the surface, both are dark brown, the former is thicker and the latter is thinner.
Comparing the two, soy sauce won.
In taste, the former provides umami flavor, while the latter provides salty sweetness. Generally speaking, it's best not to use them together, and it's no big deal to use them together, but pay attention to putting less salt, because both seasonings are already sodium.