Tofu, which is a Chinese specialty, has been invented since the Han Dynasty. Grinding tofu was prevalent during the Yuan Dynasty. Why do you have to grind good soybeans into tofu? Now know, soybean if fried, boiled, popped after eating, the human body to it contains nutrients absorption rate of only about 50%. Because soybeans have a layer of thin and strong cell membrane, wrapped around the nutrients it contains, which prevents the body from absorbing the nutrients. There is also a trypsin inhibitor in soybeans, because it is not destroyed, it will inhibit the activity of human trypsin, affecting trypsin to play a digestive role. This is the reason that some people eat too much fried, boiled, popped soybeans feel bloated or indigestion. Soybeans into tofu, its cell membrane is destroyed, the nutrients can be smoothly absorbed by the body, which the trypsin inhibitor is also destroyed, so the body's pancreatic enzymes will not be inhibited, you can play a good role in digestion. This shows that the soybean into tofu is not superfluous, but greatly improve the nutritional value of soybean (and destroy the harmful substances), is extremely beneficial to people.
The main component of tofu is protein. It has been reported that 120 grams of tofu contains protein equivalent to that contained in an egg. Tofu is also comparable to nutritious lamb, every 100 grams of tofu contains more protein than the same amount of lamb contains 2.2 grams of protein. It can be seen that the ancients called the tofu "small slaughter sheep" is justified.
It is well known that protein is an important component of the human body. Protein is composed of more than twenty different amino acids, some of which are not synthesized by the human body itself, such as phenylalanine acid, leucine, isoleucine, methionine, valine, lysine, tryptophan, threonine, etc., to be ingested from food, which is often referred to as "essential amino acids". Wonderful in the tofu contains the human body can not synthesize these "essential amino acids", but also can reduce blood cholesterol, which has cardiovascular disease sufferers are really looking for a good food. Tofu also contains sugars, fats, minerals and vitamins. People call tofu "plant meat" is justified.
Tofu has been associated with medicine since ancient times. According to "Yanshou book" records "rest for a long time dysentery, white tofu vinegar fried food that is healed. Sore swollen, tofu slices paste, often easy. A method of boiling wine paste, color red that is easy, not red is already." Hua Tuo on the use of tofu slices applied externally for the treatment of canker sores and swellings, the efficacy is very good. The famous Tang Dynasty physician Sun Simiao compiled the "Thousand Golden Essentials" and "Thousand Golden Wings" there are many on the tofu treatment of disease records. Li Shizhen's Compendium of Materia Medica says, "Tofu clears heat, harmonizes the spleen and stomach, eliminates flatulence, and brings down turbid Qi in the large intestine." Tofu, tofu skin, tofu pulp, tofu dregs, tofu slop, etc. can be used as medicine. According to reports, with tofu, almonds, ephedra decoction can treat bronchial asthma cold attack; tofu stewed fresh carp can be used tofu skin indirectly on the fire until charred, and research into finely ground and to sesame oil and compress the affected area, with soybean milk, eggs, plus sugar service, can be ning cushioning and replenish blood. Add rosin in hot soybean milk, pounded evenly outside, can cure foot infection. Tofu dregs fried and fine research and brown sugar can cure blood in the stool. Tofu slop on the laxative, expectorant and treatment of multiple boils, have a certain effect. Others use tofu and crucian carp soup drink, used for measles out of the agent when the heat; will be boiled dry soybean milk and raw rhubarb *** research fine powder, to rice soup to treat pregnant women with blood in the urine. With fresh tofu dregs steamed hot, remove immediately after adding tung oil mix, hot compresses on the affected area, used to treat chronic ulcers on the body surface.