Overview of the efficacy and functions of Rehmannia glutinosa

Rehmannia glutinosa is a commonly used nourishing medicinal material in traditional Chinese medicine. It is divided into three types: fresh rehmannia glutinosa, raw rehmannia glutinosa and cooked rehmannia glutinosa, each with different effects. Fresh Rehmannia glutinosa is good at clearing away heat and cooling blood, raw Rehmannia glutinosa is good at nourishing yin and reducing fire, and cooked Rehmannia glutinosa is good at nourishing blood and replenishing essence. Its main functions includeNourishes yin and blood, clears heat and promotes body fluids, regulates liver and kidneys, suitable for symptoms such as blood deficiency and chlorosis, yin deficiency, fever, and irregular menstruation. Modern research has also found that Rehmannia glutinosa contains active ingredients such as catalpol and polysaccharides, which have certain auxiliary effects on regulating immunity and anti-oxidation. The following will elaborate on traditional applications, modern research and precautions.

Traditional applications and core functions of Rehmannia glutinosa

In the theory of traditional Chinese medicine, Rehmannia glutinosa is the representative of "yin-tonifying medicine".Rehmannia glutinosaIt is often used for febrile diseases that damage yin, red tongue and polydipsia, such as "Xijiao Dihuang Decoction" in "Treatise on Febrile Diseases";Rehmannia glutinosaIt is mostly used for blood deficiency and chlorosis, soreness of waist and knees, and the classic prescription "Liuwei Dihuang Pills" uses it as the main medicine. The ancients believed that it "fills bone marrow and grows muscles" and is especially suitable for premature aging and premature graying of beard and hair caused by liver and kidney deficiency. It is worth noting that fresh rehmannia glutinosa has strong cold properties and is mostly used for emergencies such as vomiting blood and epistaxis due to excessive blood heat.

Modern research and pharmacological effects

Modern pharmacological research shows that the active ingredients of Rehmannia glutinosa are such asRehmannia glutinosa polysaccharide, verbascosideIt has the functions of regulating blood sugar, anti-inflammatory and protecting cardiovascular and cerebrovascular diseases. Animal experiments show that its extract can promote hematopoietic function and improve anemia (see table). In addition, the antioxidant components in Rehmannia glutinosa have certain potential to delay cell aging, but further clinical verification is needed. It should be noted that rehmannia glutinosa should not be taken excessively for a long time, especially for those with spleen deficiency and dampness, to avoid causing abdominal distension.

Usage precautions and collocation taboos

Although Rehmannia glutinosa is a good nourishing medicine, it needs to be used according to syndrome differentiation. Rehmannia glutinosa is cold in nature.People with spleen and stomach deficiencyAmomum villosum and tangerine peel should be combined to neutralize the medicinal properties; Rehmannia glutinosa is greasy and easily hinders digestion, so it can be taken with hawthorn and poria. In addition, avoid eating gas-damaging foods such as radishes and green onions during the period of taking it. Special groups such as children and pregnant women should use it under the guidance of a physician and avoid abuse on their own.

Summary and scientific understanding

Taken together, the effects of Rehmannia glutinosa cover both traditional tonic and modern pharmacological values, but its scope of action needs to be viewed rationally. As an auxiliary conditioning method, it is more suitable forchronic debilitating diseaselong-term care rather than emergency treatment. It is recommended to combine physical constitution and symptoms, make reasonable selections under the guidance of professional Chinese medicine practitioners, pay attention to the latest research progress, and avoid blindly pursuing "universal tonics".

Quote sources:

1. "Chinese Pharmacopoeia" 2020 edition (National Pharmacopoeia Committee)
2. "Compendium of Materia Medica" by Li Shizhen (Ming Dynasty)
3. "Chinese Clinical Materia Medica" Zhang Tingmo (People's Medical Publishing House)