The difference between two colors of kelp is:
The natural color of kelp belongs to brown and belongs to algae. Although kelp has no differentiation of roots, stems and leaves, it still contains chlorophyll and lutein. When lutein is destroyed by heating, chlorophyll is released and turns green. This brown kelp is made of dried kelp, which is nutritious and delicious.
There is also a kind of green, this kind of kelp is processed with salted kelp, and the nutrition is not well maintained.
The normal color of kelp is dark brown. After salting or drying in the sun, kelp with natural dark green or dark green color should be carefully purchased. If the washed water is abnormal in color after kelp is bought home, it is necessary to stop eating it, so as not to affect your health.
So dark brown kelp is better.
Extended data:
The natural color of kelp belongs to brown and belongs to algae. Although kelp has no differentiation of roots, stems and leaves, it still contains chlorophyll and lutein. When lutein is destroyed by heating, chlorophyll is released and turns green.
Edible processing method of kelp
1. Put dried kelp on a steamer and dry steam it for 20-30 minutes;
2. Put the steamed kelp into clear water, add a spoonful of flour (or starch), and gently stir and soak for 10 minute. Note: Do not soak for too long, otherwise the nutrients (iodoacetic acid, mannitol, etc. ) kelp will dissolve and run off.
3. 10 minutes later, gently rub the kelp with your hands, and you will find that all the sediment has fallen and the water is mixed and dirty. At this time, rinse with clear water several times.
efficacy
Radiation resistance
Kelp can prevent the absorption of radioactive element strontium. Radioactive strontium does great harm to human body after it enters human body. It can radiate radiation in the body, causing damage to bone marrow, damaging its hematopoietic function, affecting bone marrow growth, and inducing bone cancer and leukemia. Sodium alginate in kelp can not only prevent strontium from being absorbed by digestive tract, but also excrete old radioactive strontium from the body. In addition, sodium alginate can excrete lead from the body. Lead entering the human body will cause serious damage to the nervous system and hematopoietic system, and eating kelp often will play a role in discharging lead.
Prevention and treatment of goiter
Iodine deficiency in human body can lead to goiter, and children with iodine deficiency can't fully develop their brains and sexual organs, and their bodies are short and mentally retarded, that is, they suffer from so-called "dementia". Kelp is rich in iodine. Eating kelp has a good effect on preventing and treating goiter and promoting intellectual development.
Slimming effect
Kelp contains a chemical that can prevent the body from absorbing fat, which is good for losing weight [8]? . Researchers at Newcastle University in England found that alginate contained in kelp can effectively inhibit the digestion and absorption of fat. When the content of an alginate increases by four times, the body's ability to resist fat absorption will increase by 75%[4]? .
Skin care hairdressing
Kelp contains many vitamins, especially carotene, which can be converted into vitamins. Vitamins help to form glycoproteins, maintain the normal function of the skin, prevent infections and skin diseases, keep the skin smooth and delicate, and enhance its toughness. Kelp contains a lot of nutrients such as sulfur-containing protein, which is of great benefit to hairdressing.
Reference source: Baidu Encyclopedia entry-kelp