Whole-wheat flour is a product made of whole-grain wheat by grinding and sieving, and retaining the same proportion of endosperm, bran and germ as the original whole-grain wheat. This kind of flour has a rough taste compared with other flours, but it has high nutritional value. It can be used to make steamed bread biscuits, but it is generally not used to make cakes.
Wheat bran is rich in vitamin B 1 and vitamin B2. In 20 12, a new study by Shanghai Institute of Life Sciences, Chinese Academy of Sciences showed that with the decrease of vitamin B 1 intake in human body, the risk of depression increased significantly. Vitamin B2 is also a nutrient that Chinese residents generally lack, which plays an important role in human growth and metabolism, and unprocessed whole grains are a good source of vitamin B2.
Secondly, bran is rich in dietary fiber, which can promote gastrointestinal peristalsis, improve gastrointestinal function and prevent constipation. At the same time, dietary fiber can alleviate the rising level of postprandial blood sugar, reduce insulin secretion and inhibit fat synthesis, which is very helpful for preventing obesity and diabetes.
In addition to bran, wheat germ is also rich in nutrients. Although the weight of germ only accounts for about 2.5% of the whole wheat grain, its nutrition accounts for 97% of the whole wheat grain, which contains more than 50 kinds of rich nutrients needed by human body. Wheat germ contains 8 essential amino acids needed by human body. Wheat germ is also rich in calcium, potassium, magnesium, iron, zinc, selenium, phosphorus, manganese, copper and other minerals and trace elements.
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How to choose whole wheat flour;
1, choose whole wheat flour to see the color: because whole wheat is ground whole wheat, its color is darker than ordinary flour, showing yellow color; If the whitening agent is added to the flour, the oxidation reaction will occur, and the flour will become white or miserable white.
2. Select whole wheat flour and knead it by hand: When the whole wheat flour is opened in the palm, you can see that there is crushed bran in it, which is rougher than ordinary flour. The flour mixed with talcum powder, lime powder and other substances feels slippery.
3, choose whole wheat flour to smell: good whole wheat flour should be rich in wheat, fragrant smell, inferior whole wheat flour will appear tasteless or with a little chemical taste. At the same time, because the flour is powdery, it has a strong ability to absorb flavor and moisture. If it is dried again after being damp, it will bring some musty smell, and it is best to smell a little wheat fragrance.
Baidu Encyclopedia-Whole Wheat Flour