Overview of the efficacy and functions of Rehmannia glutinosa

Rehmannia glutinosa is a commonly used medicine in traditional Chinese medicine for clearing away heat and cooling blood.Nourishes yin and reduces fire, cools blood and stops bleeding, nourishes yin and promotes fluid productionIt is mainly used to treat symptoms such as febrile disease damaging yin, yin deficiency fever, blood heat and bleeding. Its mechanism of action is closely related to regulating body fluid metabolism and improving microcirculation. The main content is divided into three parts: First, the explanation of Rehmannia glutinosatraditional medicinal valueFor example, "Compendium of Materia Medica" records that it "mainly breaks down the tendons and drives blood numbness"; secondly, it is confirmed by modern researchPharmacological effects, such as anti-inflammatory, regulating immunity, etc.; the third isclinical application, such as compatibility with other traditional Chinese medicines to treat diabetes, menopausal syndrome, etc. The following will expand one by one.

Traditional medicinal value and classic records

Rehmannia glutinosa is listed as top grade in "Shen Nong's Materia Medica", which is said to be "mainly responsible for injuries, removing blood numbness and filling bone marrow". Li Shizhen further pointed out in "Compendium of Materia Medica" that it can "cool blood, nourish yin, and relieve irritability and heat." In traditional usage, Rehmannia glutinosa is often combined with Scrophulariaceae and Ophiopogon japonicus to enhance the effect of nourishing yin; if used together with red peony root and paeonol bark, it focuses on cooling blood and removing blood stasis. itsPreparation methodIt also affects the efficacy - fresh rehmannia glutinosa is good at clearing away heat and promoting fluid production, dry rehmannia glutinosa (raw rehmannia glutinosa) focuses on nourishing yin, and cooked rehmannia glutinosa is good at nourishing blood. This difference reflects the traditional Chinese medicine wisdom of "same origin but different effects".

Scientific verification of modern pharmacological effects

Modern research shows that Rehmannia glutinosa containsIridoid glycosides, polysaccharidesand other active ingredients, which have clear anti-inflammatory, antioxidant and immunomodulatory effects. Animal experiments show that its extract can lower blood sugar (as shown in the table below) and protect myocardial ischemia-reperfusion injury. In addition, rehmannia glutinosa polysaccharide can promote the proliferation of hematopoietic stem cells, which provides scientific basis for its traditional effect of "filling bone marrow." However, it should be noted that its efficacy is dose-related. Overdosage may cause diarrhea, so it must be used according to medical advice.

Clinical application and compatibility examples

Clinically, rehmannia glutinosa isLiuwei Dihuang PillsThe core ingredient is used for kidney yin deficiency syndrome. The dermatology department often uses it in combination with peony peel to treat blood-heat urticaria; the endocrinology department uses it in combination with coptis and trichosanthin to improve the thirst symptoms of diabetes. Recent studies have found that the 1:2 compatibility of Rehmannia glutinosa and Astragalus membranaceus can significantly relieve menopausal hot flashes, and the mechanism may be related to regulating the expression of estrogen receptors. However, it should be noted that people with spleen deficiency and dampness should use it with caution to avoid dampness and stomach obstruction.

Summary and usage suggestions

Rehmannia glutinosa, as "the first medicine to nourish yin and cool blood", has both traditional efficacy and modern scientific verification. Needed when usingTreatment based on syndrome differentiation: For blood-heat disorder, fresh products can be used, while for yin deficiency and internal heat, dry products should be used. Although it is relatively safe, long-term use still requires the guidance of a Chinese medicine practitioner to avoid using it with diuretic and dampness-removing drugs, which may weaken the efficacy of the drug. Future research can further explore its anti-aging and anti-tumor potential and give new value to traditional Chinese medicine.

Quote sources:

1. "Compendium of Materia Medica" (Li Shizhen, Ming Dynasty)
2. "Chinese Pharmacopoeia" 2020 Edition
3. Zhang Boli "Pharmacology of Traditional Chinese Medicine" People's Medical Publishing House
4. Experimental data are quoted from "Chinese Herbal Medicine" Volume 50, 2019