Which causes cancer, mountain bracken or water bracken?
What substance does bracken contain that is so carcinogenic? After more than 20 years of unremitting efforts, in the early 1980s, Japanese scientists successfully isolated a substance called protopterin. Protopterin exists in the roots, stems and leaves of Polygonum cuspidatum, with the highest content in the stems. Subsequently, people carried out animal experiments with "protopterin" and found that it can really induce the above symptoms and diseases. Scientific research has proved that bracken contains cancer-related substances, including phenyloxalic acid, fern lactam, flavanol, calamine and some substances similar to calamine, which are related to digestive tract cancer. Of course, eating bracken once or twice will not cause cancer immediately, which is related to the amount of carcinogens ingested, but eating bracken for a long time will be harmful to health. Don't panic if you used to eat it often, because in the processing of bracken, we usually blanch it with water before eating it, which will greatly reduce the content of the original bracken. However, such treatment only reduces, not eliminates, and the original glycoside will still accumulate in the body if it is eaten for a long time. Therefore, although bracken is beautiful, it is better to stay away from it.
The difference between mountain bracken and water bracken
Pteridium aquilinum is the tender leaf of Pteridium aquilinum. Pteridium aquilinum is the tender leaf of Pteridium aquilinum. After boiling water, soak it in clear water, which is mostly used for hot dishes. 1 year-old aquatic herb, 30-80 cm high, green and multi-method. The rhizome is short, the leaves are erect and hairless. The petiole of sterile leaves is 10-40 cm long, fleshy, the leaves are erect or floating, long and narrow and round, with 2-4 deeply pinnate compound leaves, and the fertile leaves are large, oblong or ovoid triangle, with a length of 15-40 cm and a width of 10-22 cm, 2.
Pteridium aquilinum is the bud of wild ferns, and its young leaves are collectively called Pteridium aquilinum. Pteridium aquilinum is one of its main varieties, also known as "leading dish" and "auspicious dish", and the locals call it "cat's paw" dish.
Pteridium aquilinum seedlings are small and sharp, curled and bent inward, shaped like cat's claws, turquoise, and spread out after maturity. Petiole yellow-brown, one to two feet long; The rhizome grows underground, with a layer of dark brown fluff outside, which contains a lot of high-quality starch and can be used to extract fern powder.
The practice of bracken
Cold bracken
material
Pteridium aquilinum, cucumber, chili oil, vinegar, salt, sesame oil and minced garlic.
working methods
1, clean and scald with boiling water to remove the sticky earthy smell on the surface. This step is needed before cooking wild vegetables.
2. Cucumber grows into strips with a peeler, folds back and puts it on the edge of the plate.
3. Cut the bracken into sections and add Chili oil, vinegar, salt, sesame oil and minced garlic.
4. Mix bracken and seasoning well and pour into a dish with cucumber strips. The taste is crisp and the fragrance is long.
Sauteed water fern
material
400g of water fern, 5 pieces of minced garlic, Kaiyang 10g, Fucai 80g, salt 1 teaspoon, monosodium glutamate 1 teaspoon and water 1/2 cups of water.
working methods
1. Pick the young leaves and broken nodes of Pteris Pteris, blanch them quickly with boiling water, and then rinse them with cold water for later use.
2. Take the oil pan, stir-fry minced garlic, Kaiyang and Fucai, add seasonings, and then pour the water fern with the method of 1, stir-fry quickly for about 10 second.