Because seaweed is purple, it is called seaweed, but in fact, seaweed also has other colors, such as brown-green and brown-red. Seaweed is suitable for soup. When we cook seaweed soup, we will find that the color of the soup is green. This is normal. The green color is because after the phycoerythrin in seaweed, which is related to purple, is heated and decomposed, there is more chlorophyll left. , so you can drink it with confidence. Can seaweed still be eaten if it is cooked green?

It is edible. This is normal.

The reason why seaweed is purple is because it contains a special pigment called "phycoerythrin". Phycoerythrin is soluble in water. In addition, this pigment protein is unstable and easily decomposes when exposed to heat. After the soup is cooked, the seaweed will turn green, because in addition to containing phycoerythrin, seaweed also contains pigments such as chlorophyll, carotene and lutein. Among them, the chlorophyll content is the highest. It takes the place of phycoerythrin, thus "greening" the leaves.

It is the same as chlorophyll in vegetables and is non-toxic. Seaweed that has been stored for a long time will also turn green due to the gradual degradation of phycoerythrin. This is also a normal phenomenon and can be eaten with confidence. Is it okay to eat seaweed soup that is slightly red in color?

It is normal for the water to turn purple after soaking seaweed. Nori contains purple pigment. After being soaked in water for a long time, it is normal for the purple pigment to slowly dissolve in the water. As long as the discoloration is not serious, the wine will be fine. It is normal for seaweed to turn a light purple-red color after soaking, but "water color discoloration" cannot be used to judge whether seaweed is dyed and needs to be sent for inspection. How to choose seaweed

1. Purple-red is the best color. If the color is black, it may be old seaweed. If the color is red, it means it is relatively tender.

2. Pay attention to the uniform thickness, and there should be no obvious holes or missing corners. If there are small holes, it may have been improperly stored during storage and transportation, affecting the quality.

3. Pay attention to aged seaweed. Some unscrupulous traders coat old seaweed with cooking oil and pass it off as new seaweed. You can wipe it with paper towel. There will be oil stains on the paper, while old seaweed has no fragrance and has a fishy smell in the mouth. ? Will eating seaweed make you fat?

Normal consumption of seaweed will not cause patients to gain weight. The protein in vegetables is higher than ordinary vegetables and rich in amino acids. The fat content of seaweed is also very low. The content of B vitamins in seaweed, especially vitamin B12, is very high, which helps activate brain nerves and prevent memory loss. It is recommended to pay attention to exercise when losing weight, and insist on aerobic exercise no less than 4 times a week, so as to achieve a good fat loss effect.