Zhang Ye, director of the Nutrition Department of the 309 Hospital of the People's Liberation Army, pointed out that natural flour contains a small amount of carotene, and the more the color is in the outer layer, the yellower it becomes after cooking. However, most consumers think that steamed bread should be white and big, which gives businesses an opportunistic opportunity to "beautify" pasta with additives.
2. Purple rice steamed bread with uniform color may be dyed. Small grains can always be seen in miscellaneous grains pasta. If it is blue-purple, it is usually true. There is a distinguishing method in Fan Zhihong: the pigment of purple rice steamed bread comes from anthocyanins, which will turn red under acidic conditions and blue under alkaline conditions. After buying home, you can add a drop of vinegar to the steamed bread. It is true that the color turns red. The color of green pasta comes from chlorophyll. It is true that the color turns olive green after adding some vinegar. If it doesn't change color, it is dyed.
3. The coarse grains with delicate taste are fake.
Some so-called corn steamed bread may be made of white flour and yellow pigment; Whole wheat steamed bread may be made of caramel pigment; The fragrance of corn can be forged with essence; Whole wheat steamed bread can also be supplemented with wheat bran ... but the texture and taste of coarse grains can't be fake. If coarse grains are as delicate as white steamed bread, they may be counterfeit products.
4. A good steamed bread will return to its original state after being pinched.
Otherwise, fillers or too much yeast may be added. Sean pointed out that if it feels soft and tastes like bread, it will leave a small ball when pinched, so it is best not to buy it.
5. Buy less fried and stuffed staple foods.
In order to control the cost, many staple food kitchens generally fry for a day without changing the oil. There is a suspected carcinogen in oil called "acrylamide", so you should eat less, especially for children with weak detoxification ability. The same is true for foods with stuffing, and the freshness of meat and vegetables inside cannot be verified.
6. Compared with bagged staple food,
The safety of on-site production is higher. In addition, generally speaking, good steamed bread will become hard and moldy in two or three days. When buying, first pay attention to freshness. It is best to buy coarse cereal pasta and oil-free pasta produced that day. If you can't finish it in a day or two, you might as well divide it into small packages, tie your mouth and put it in the refrigerator for more than two weeks. [5]
How to distinguish when editing this paragraph?
Identification method of lemon yellow
Lemon yellow is a kind of synthetic pigment, and its maximum dosage in food processing in China is very small. Excessive use is harmful to consumers' health. Experts suggest that to identify whether "corn pasta" is mixed with pigment, a small amount of samples can be soaked in water, and the filtrate of "corn pasta" dyed with lemon yellow is yellow.
Sensory taste can identify "dyed steamed bread"
What inspection links does a steamed bread product need from production to sales? Yesterday, a person with experience in steamed bread production introduced that regular suppliers would be required to provide test reports of raw flour. Manufacturers have their own testing center, which will test the steamed bread produced every day. The quality supervision department will also conduct routine inspections on enterprises. In order to avoid excess products, production is usually fixed by sales. How to distinguish "dyed steamed bread" from pigment and preservative? Relevant persons said that the real identification needs professional inspection to confirm, but consumers can also simply distinguish some differences from senses and tastes. The real corn flour steamed bread is light yellow, and some small corn fiber particles can be seen, while the steamed bread with pigment looks unnatural and heavy in color, and no corn fiber can be seen. When eating, the corn flour steamed bread will have a faint corn flavor, while the steamed bread with only pigment has a heavy flavor.