What is Qing Dai?
Qing Dai
Qing Dai(scientific name:Common Baphicacanthus Rhizome and Root), a traditional Chinese medicine, also known as
Indigo Naturalis, is a dried powder, lump, or granule made from the leaves or stems of Baphicacanthus cusia (Nees) Bremek. of the Acanthaceae family, Polygonum tinctorium Ait. of the Polygonaceae family, and Isatis indigotica Fort. of the Cruciferae family. It has a salty taste, and its medicinal properties are cooling and clearing, with astringent effects. It enters the liver and lung meridians and has powerful therapeutic action. It is taken internally to clear heat toxins, cool blood, remove blotches, and stop convulsions, and applied externally to resolve inflammation, reduce swelling, and promote wound healing. It is an important medicine for treating spotted fever, eruptive diseases, and liver and lung disharmonies, and is also commonly used to treat skin infections, sore throat, and swelling. In ancient times, it was also used for dyeing and eyebrow painting.
Indigo Naturalis
Indigo Naturalis is a deep blue powder that is light and easily airborne, or an irregular porous lump or granule that can be finely ground by rubbing it with the hands. It has a slight grassy odor and a mild taste.
Growth environment of Qing Dai
(1)Ecological environment
It grows mainly in mountain grasslands and along the edge of forests in damp places, either wild or cultivated.
(2)Resource distribution
Qing Dai is mainly produced in Fujian, Yunnan, Jiangsu, and Anhui provinces in China. It is also produced in Jiangxi, Henan, and Sichuan provinces. The best quality is produced in Fujian and is called Jian Qing Dai.
Harvest and Processing of Qing Dai
Harvest
Harvested In early winter. The leaves or stems of Baphicacanthus cusia (Nees) Bremek. of the Acanthaceae family, Polygonum tinctorium Ait. of the Polygonaceae family, and Isatis indigotica Fort. of the Cruciferae family are harvested and placed in a vat.
Processing
Qing Dai
The freshly harvested leaves and stems are placed in a vat and soaked in water for 2-3 days until the leaves become soft and the branches can be removed. One kilogram of lime is added to every 10 kilograms of leaves, and the mixture is thoroughly stirred. When the soaking liquid turns purplish-red, the foam on the surface is removed and dried, which is Qing Dai of the highest quality. When the foam decreases, the mixture can be left to settle for 2-3 hours, and then the clear liquid on the surface is removed. The sediment is then sieved to remove any broken debris, stirred again to generate foam, which is then collected and dried to produce Qing Dai of lower quality. It is then ground into fine powder and sieved through a 80-mesh sieve.
Fei Qing Dai
Clensed Qing Dai is ground in a bowl with an appropriate amount of water, mixed and finely ground. Water is added gradually, and the mixture is stirred slowly to suspend the fine powder. Then the mixture is poured into another container and allowed to settle. The clear water above is decanted, and the sediment is dried, ground into a fine powder.
Storage
Stored in dry places.
Qing Dai TCM
Medicine part
The dried powder, blocks or granules made from the leaves or stems of the Labiatae plant, Malan, the Polygonaceae plant, Liao Lan, and the Cruciferae plant, Song Lan.
Taste
Salty in taste, cold in nature.
Tropism
Enter the liver, lung, and stomach meridians.
Effect
Qing Dai has the effects of clearing inner-heat and detoxifying, cooling blood and eliminating spots on the face, clearing liver-heat, and calming convulsions.
Attending
Qing Dai is mainly used to treat warm-toxin rash, blood-heat vomiting and bleeding, chest pain and bloody coughing, oral ulcer, mumps, throat numbness, and childhood epilepsy.
Dosage
Oral administration
Ground into powder, 1.5~6g, or made into pills.
External application
Take an appropriate amount, sprinkle on or apply topically.
Taboo
(1) Qing Dai belongs to a cold natured medicine, and it should be avoided by people with spleen and stomach deficiency and pregnant women.
(2) During medication, one should avoid eating cold or raw, spicy or greasy foods, smoking and drinking.
(3) Avoid using iron utensils to decoct the herbs.
Related discussion
(1) Pharmacology, Qing Dai is used to treat infantile malnutrition fever and wasting, and kill parasites.
(2) Supplement to Materia Medica, Qing Dai has the effects of detoxifying.
(3) Compendium of Materia Medica, Qing Dai can help relieve restlessness and fever, stop bleeding, resolve phlegm, treat skin ulcers and genital sores, and kill harmful parasites.
(4) Notes on Materia Medica, Qing Dai is used to treat stroke, headache, rib pain, swollen boils, tremors, dizziness, cough, chronic cough, vomiting, bleeding from the tongue, coughing with blood, and prolapse.
(5) Classics of Materia Medica, Qing Dai plays a certain role in treating warm toxin-induced rashes and severe postpartum dysentery.
(6) Essential Prescriptions of the Golden Cabinet, Qing Dai has the benefits of clearing inner-heat and detoxifying, and also cooling blood.
Related compatibility
(1) Qingdai is compatible with Niuhuang, Gou Teng and other herbs, which can be used to treat infantile high fever seizures and other diseases.
(2) Qingdai is compatible with Gualou Ren, Beimu, Fuhai Shi and other herbs to treat hot cough, thick phlegm and other symptoms.
(3) Qingdai is compatible with Xuanshen, Jinyinhua, Lianqiao and other herbs to treat oral ulcers, skin soft tissue infections like boils, and other conditions.
(4) Qingdai is compatible with Shigao, Shengdi, Shengma and other herbs to treat hot toxins, blood heat and other conditions.
(5) Other compatible herbs include Mabo, which can promote lung qi and cool blood to stop bleeding, Hai Ge Ke, which can clear inner-heat and detoxify, and Pu Huang, which can purify the liver meridian, cool blood and stop bleeding.
Qing Dai benefits
Qing Dai, also known as Indigo Naturalis, is in the same category as Ban Lan Gen (Isatis root). It is also called Qing Dian Hua or Dian Mo Hua. It is cool in nature and salty in taste. Qingdai enters the Liver, Lung, and Stomach meridians and has the effects of clearing inner-heat, cooling blood, detoxification, and calming the mind.
In addition, Qing Dai has many pharmacological effects like anti-pathogenic microorganisms, anti-inflammatory, pain-killing, and anti-ulcerative colitis.
Qing Dai side effects
Due to its cool property, Qing Dai can easily damage the stomach functions, so people with stomach cold should use it with caution. Some patients may experience symptoms like nausea, vomiting, abdominal pain, diarrhea, and bloody stools after taking it. It can also affect liver function, and in severe cases, it can inhibit bone marrow hematopoietic function and cause thrombocytopenia.
How to take Qing Dai?
(1)Most commonly, Qing Dai is used in decoction. The usual dosage is 1-3g.
(2)Qing Dai can also be made into powder or pill forms.
(3)Qing Dai is commonly used in medicated diets. According to the documents released by the National Health Commission and the State Administration for Market Regulation, Qing Dai can be used as a medicinal and edible substance within a specified range and dosage.
Almond Cake with Qing Dai
Ingredients
10g of almonds, 10 persimmons, 10g of Qing Dai
Instructions
(1) Peel the almonds, fry them until turning yellow, and grind them into a paste.
(2) Mix in Qing Dai and form into cakes.
(3) Divide the persimmons into halves and put the almond paste cakes inside it. Wrap all of them in damp paper and simmer until done.
Eat it twice a day, in the morning and evening respectively.
Attention
The use of Chinese traditional herbs should be based on different diagnoses and treatments and should be used under the guidance of a professional Chinese medicine practitioner. Do not use it recklessly on your own.
How to choose Qing Dai?
Genuine Qing Dai
Genuine Qing Dai is an extremely fine powder with a grey-blue or deep-blue color. It is lightweight and easily airborne, and feels smooth when rolled between fingertips. When touched, it sticks to fingers and paper. It has a grassy odor and a slightly tart taste. When mixed into water, it floats on the surface with only a few particles sinking. When burned over a low flame, it produces a strong purplish-red smoke and leaves behind dark brown ash. When heated on an iron plate, it melts and forms a black fine powder. When mixed with nitric acid in a small amount, it produces bubbles and turns brownish-red.
Fake Qing Dai
Fake Qing Dai is made with a mud base and mixed with dye. The main blue pigments contained in it are malachite green, indigo, acid blue, and basic blue. It is a bluish-grey powder that is slightly heavier and less airborne. It feels rougher when rolled between fingertips and has glittering speckles. It has a grassy odor and a mild taste with noticeable sand-like texture. When mixed into water, most of it sinks. When burned over a low flame, it produces a small amount of purplish-red smoke with bubbles and leaves behind yellowish-brown ash. When mixed with nitric acid in a small amount, it produces bubbles and turns brownish.
How to buy Qing Dai?
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