Food colors colorful, such as black black rice, purple purple cabbage, green spinach, etc., not only to bring a visual feast, but also increased our appetite. However, as the saying goes, "No one is perfect and there is no shortage of gold." Food also has its own inadequacies. Such as a lot of food into the water when washing will appear fade phenomenon, in which case many people are worried about these fade food is not by unscrupulous businesses, such as coloring methods have been dealt with, food fade really because of staining ?
When it comes to staining foods, most people talk about "staining" and discoloration, because industrial stains do a great deal of harm to our human health. In order to meet the color of our food color and fragrance of the pursuit, many foods tend to add pigment, but the addition of this pigment is food coloring, rather than industrial dyes, food coloring as long as the national standard allows the body is not harmful of. The purpose of adding food coloring is because food coloring has the advantage that its natural pigment can not be compared in the application process, that is, it is not easy to fade in the coloring of food and has good stability and is good for the preservation and sale of food. The natural pigment in coloring and food coloring opposite. Therefore, when we look at food, we must not look at appearances. The faded food is not necessarily dyed, and the food that does not fade is not necessarily natural. For example, the following is a common food:
Black food: black rice, black sesame seeds and so on
In everyday life, the price of black food is often much higher than the white food of the same kind, such as black sesame and black rice. Black food fade is a normal phenomenon, because black foods tend to contain higher anthocyanins, anthocyanins soluble in water, so anthocyanin-rich foods easily fade, is often suspected of staining the object . Anthocyanins is a special kind of nature, in case of alkaline blue, acid red. Identification of foods containing anthocyanins is not stained, you can use the special nature of anthocyanins, with white vinegar or baking soda can test it.
Red food: wolfberry and so on
Wolfberry rich in lycopene, a variety of vitamins, calcium, lycium barbarum polysaccharides and other beneficial substances, is a combination of medicine and food plant fruit. Wolfberry is not only delicious but also the color is rosy. We are in the purchase of Chinese wolfberry medlar if you find the color is particularly red, then you have to pay attention, because this wolfberry may be dyed. Identification of Chinese wolfberry staining method is very simple, dyed goji berry whole is red, undyed wolfberry pedicle has a white spot. Put the dyed medlar in the water, you will find the color of the water is deep, and even became brick red. The real medlar soaked in water, the color of the water is a little bit red, so the Chinese wolfberry is not go through the dyed medlar.
Yellow food: millet, orange and so on
Oranges are also one of the most frequently stained foods, and the stained oranges look better and the economic benefits gained from them increase. When buying oranges, if the epidermis is red and even the epidermal holes have red spots, the oranges may be dyed oranges. You can also wipe the oranges with a wet wipe. If the wipes turn red, the oranges may be dyeing.
Millet is a popular northern food in the autumn and winter, there is "Millet soup Soup" argument. Normal millet in the wash, the water will not change color. The stained millet may fade during cleaning, if you find the water a little yellow, it is recommended that you do not eat such a millet.
With the development of society, many foods appear new colors, these foods fade and discoloration is normal. However, there are also many unscrupulous businessmen in order to seek more benefits of food coloring, it is recommended that you try to choose the formal channels to buy food, and learn more about some plant pigment knowledge, to avoid the purchase of dyed food.