The brine used to make tofu is toxic, gypsum is also toxic, but the tofu is not toxic, but if the brine point tofu, then it is non-toxic, brine in the chlorine ions are poisonous, but when he is non-toxic salt, the same reason, brine in the chlorine ions in the soymilk reaction of calcium, so the tofu is made out of non-toxic. But if the brine is used in excess, tofu is still toxic, but if the brine is used in excess, then the tofu is blackened and hardened will not be able to use, so we use are not non-toxic, although the brine is toxic, but we eat tofu is non-toxic, which is called a thing of the past, so in general we can rest assured that we can eat tofu, do not have to worry about it is toxic, if the tofu is toxic, then it can not be used, the use of brine is toxic. Then it can not be used, the use of brine in excess of toxic tofu is going to become black and hard, can not be used, so we do not have to worry about, we eat in the mouth of tofu is toxic, and when such as chlorine ions in the water meet salt, then it will become non-toxic, so use it to point the tofu is most appropriate. But brine can not be used alone, because alone is toxic, brine is toxic, so brine can not be eaten alone, but if you use brine point tofu, then tofu is non-toxic, tofu can be assured that the use of, because if the amount of brine used is too much, then made out of the tofu is not for everyone to eat, so usually we buy white and tender tofu are non-toxic tofu, you can Do not worry, eat it will be poisoned, and the nutritional value of tofu is still relatively high, so in normal times we do not because of the brine is toxic, do not dare to eat tofu, although the brine is poisonous, but it salt will become non-toxic, so use it to point tofu tofu will become very tasty. We want to eat tofu to eat, brine is poisonous, but made out of tofu is non-toxic, and with brine made out of tofu is very delicious.