1, which is better, brine tofu or gypsum tofu?

Compared with the two, brine tofu tastes healthier, but in the market, gypsum makes more tofu. Experts believe that it is better to eat less gypsum tofu, because the additives in it are not good, and eating too much tofu is a physical burden for some elderly people, which increases the burden on kidney organs.

It is better to use salt water for tofu, which is healthier. There are many kinds of tofu made of gypsum in the market, and gypsum tofu is whiter than brine tofu. Brine tofu tastes soft and tough, with beany smell, and gypsum tofu is tender and smooth. Experts believe that it is better to eat less gypsum tofu, because the additives inside are not good, and eating too much tofu is a physical burden for some elderly people, which increases the burden on kidney organs.

2. The difference between brine tofu and gypsum tofu.

Water tofu is tofu made of brine (magnesium chloride), and gypsum tofu is tofu made of calcium sulfate.

Brine tofu tastes soft and tough, with the characteristics of hardness, bean flavor, low water content, slightly yellowish white color and rough texture, commonly known as "old tofu". Northerners generally order tofu with brine, which is mainly used for frying, frying, brewing and stuffing.

Gypsum tofu is tender and smooth, characterized by high water content and white color, commonly known as "tender tofu". Generally, southerners will use gypsum to order tofu, which is mainly used for mixing, stewing, baking, making soup and soup dishes.

3. How to distinguish brine tofu from industrial gypsum tofu?

Look: Take a piece of tofu and observe it directly under scattered light. Traditional tofu is even milky white or light yellow, with a little luster; Tofu made of industrial gypsum is much whiter and dull than traditional tofu because of the addition of white pigment; There may also be waterlines, bubbles, fine particles, etc.

Hand feel: traditional tofu can feel some elasticity when pressed by hand, and its hardness is moderate; Tofu made of industrial gypsum has rough section, delicate texture and poor elasticity, and no white tofu liquid flows out.

Smell: smell it directly at room temperature. Traditional tofu is made of soybeans and has the fragrance of soybeans; Tofu made of industrial gypsum has a light smell and even smells of chemicals.

What is brine tofu?

Brine, commonly known as bittern and polished rod, is a by-product in the production of sea salt. Brine is bitter, not bittern. It is the mother liquor left in the salt pond after salt is made from seawater or salt lake water. The main components are magnesium chloride, calcium sulfate, calcium chloride and sodium chloride, which are bitter and toxic. After evaporative cooling, magnesium chloride crystals are separated out, which are called halogen blocks. Brine blocks dissolved in water, called brine, are commonly used coagulants in tofu production in China, which can solidify protein solution into gel. Tofu made of brine as coagulant has strong hardness, elasticity and toughness, and is called old tofu, or north tofu and hard tofu. Brine tofu has the functions of lowering blood pressure, buffering anemia and being beneficial to growth and development.

Harm of industrial gypsum tofu

In Chengdu, many tofu workshops are used to ordering tofu with gypsum. However, the chemical composition of gypsum is hydrated calcium sulfate, which is slightly sweet when dissolved in water and is a harmful substance to human body. When we judge whether gypsum can be eaten, we should look at its calcium sulfate content. Edible gypsum has strict hygiene standards. According to the hygienic requirements of bean products food factory, as a food additive, gypsum should contain no more than 0.5 mg of arsenic per gram and no more than 1 mg of lead per gram. The crimson industrial gypsum used in those crooked tofu workshops has excessive arsenic and lead contents and is extremely toxic. If eaten for a long time, it will cause chronic poisoning and endanger health.

The harm of industrial gypsum lies not in itself, but in that it contains many harmful impurities, especially arsenic and lead, which is extremely harmful to human body. Arsenic accumulates in human body to some extent, which may cause skin cancer and lung cancer. Skin ulcer and perforation of nasal septum are common. The arsenic content of industrial gypsum used in crooked tofu workshop exceeds the standard, which is very dangerous.