Tofu is one of the most traditional foods in China. What's the difference between tender tofu and old tofu?

Speaking of tofu, many young people may think there is no difference, not to mention the difference between old tofu and tender tofu, and the difference between south tofu and north tofu. Tofu is made from soybeans by grinding, pulping and solidification. The difference between old tofu and tender tofu lies in the different coagulants used. Old tofu is also called north tofu, and the coagulant is salt water; Tender tofu is also called south tofu, and the coagulant is gypsum. So, what's the difference between tender tofu and old tofu?

1, appearance: tender tofu is white and tender. Old tofu is yellow and old.

2. From the production point of view: tender tofu uses gypsum as coagulant, and old tofu uses salt water as coagulant. Usually the box of tofu we buy in the supermarket is tender tofu, which is not suitable for cooking and can be used to make soup. In restaurants, green onions and tofu are mixed with tender tofu. Tender tofu is also called gypsum tofu. The molding agent it uses is gypsum liquid, which is soft and delicate. Old tofu, also called brine tofu, as its name implies, its molding agent is brine, which is stronger than tender tofu and its cross section is not as smooth as tender tofu.

3, from the taste and eating method: old tofu has less water and dry and hard taste. Tender tofu has high water content and tender and smooth taste. Old tofu has low water content, high hardness and rough texture, which is suitable for stewing, frying, burning and rinsing, while tender tofu has high water content and soft texture, which is more suitable for soup, cold salad and steaming.

4. In terms of potassium content, the potassium content of tender tofu is 1.45 times that of old tofu. Studies have shown that potassium supplementation can lower blood pressure to a certain extent, so patients with hypertension are recommended to eat tender tofu. The content of zinc and selenium in old tofu is about twice that of tender tofu, and zinc and selenium are related to human immunity. The weather is getting colder and colder, the immunity is low, and it is easy to get sick. Might as well eat more old tofu, which will help enhance immunity.

nutritive value

Tofu contains a variety of nutrients and minerals, especially calcium, iron and zinc, which can improve human immunity. In addition, the digestion and absorption rate of nutrients in tofu can be as high as 95%, which is a healthy food suitable for all ages. The nutritional value of three ingredients: old tofu is higher than tender tofu, and tender tofu is higher than lactone tofu.