Qing Ying Tang (Clear the Nutritive Level Decoction)
Qing Ying Tang (Clear the Nutritive Level Decoction) is a traditional Chinese formula containing rhinoceros horn, rehmannia, and other herbs that work through heat-clearing compounds like catalpol and iridoid glycosides. The formula targets the nutritive qi level to reduce inflammatory heat patterns, fever, and mental agitation through modulation of cytokine pathways.
Origin & History
Qing Ying Tang is a traditional Chinese herbal formula composed of ingredients like rhinoceros horn and rehmannia. It is typically prepared as a decoction.
Historical & Cultural Context
Qing Ying Tang has been used traditionally in Chinese medicine to address severe heat conditions affecting the body's nutritive level. It reflects the holistic approach of balancing internal heat.
Health Benefits
- Clears heat from the nutritive level, reducing fever and preventing heat-related illnesses. - Supports mental clarity by calming the mind, which can reduce anxiety and improve focus. - Enhances skin health by detoxifying the blood, leading to a clearer complexion. - Boosts immune function by promoting healthy blood circulation, vital for nutrient delivery and waste removal. - Reduces inflammation, which can alleviate symptoms of chronic conditions like arthritis. - Promotes restful sleep by balancing internal heat, crucial for maintaining a healthy sleep cycle. - Supports cardiovascular health by improving blood vessel function, which can lower the risk of heart disease.
How It Works
The formula's primary compounds including catalpol from rehmannia and saponins from scrophularia modulate pro-inflammatory cytokines like TNF-α and IL-1β. These bioactive compounds cross the blood-brain barrier to influence neurotransmitter balance, particularly GABA and serotonin pathways. The heat-clearing mechanism involves inhibition of cyclooxygenase enzymes and prostaglandin synthesis.
Scientific Research
Research on Qing Ying Tang is limited, but some studies have investigated its components for their potential anti-inflammatory and antipyretic effects. Further research is needed to validate these findings.
Clinical Summary
Clinical evidence for Qing Ying Tang is primarily based on traditional use documentation and small observational studies in TCM hospitals. Modern research includes in vitro studies showing anti-inflammatory effects of individual herb components, with some animal studies demonstrating fever reduction in rodent models. However, large-scale randomized controlled trials specifically on the complete formula are lacking. Most clinical applications rely on traditional TCM diagnostic criteria rather than Western biomarkers.
Nutritional Profile
Qing Ying Tang is a classical TCM herbal decoction, not a single-ingredient food, so conventional macronutrient profiling does not apply in the standard sense. The formula's bioactive composition is derived from its constituent herbs, typically including: Shui Niu Jiao (Bubali Cornu, Water Buffalo Horn) as a substitute for Xi Jiao, Sheng Di Huang (Rehmannia glutinosa root, 15-30g), Xuan Shen (Scrophularia ningpoensis, 9g), Zhu Ye Xin (Bamboo leaf heart, 3g), Mai Dong (Ophiopogon japonicus, 9g), Dan Shen (Salvia miltiorrhiza, 6g), Huang Lian (Coptis chinensis, 5g), Jin Yin Hua (Lonicera japonica, 9g), and Lian Qiao (Forsythia suspensa, 6g). Key bioactive compounds include: catalpol and acteoside from Rehmannia (iridoid glycosides, ~0.3-1.2% dry weight); harpagoside and aucubin from Scrophularia; tanshinones (tanshinone IIA, cryptotanshinone) and salvianolic acids from Dan Shen (~1-3% tanshinones by dry weight); berberine, coptisine, and palmatine from Huang Lian (berberine ~5-8% dry weight, high bioavailability concerns due to P-gp efflux); chlorogenic acid and luteolin from Jin Yin Hua (~1.5-3.8% chlorogenic acid); forsythoside A and phillyrin from Lian Qiao. Polysaccharides from Ophiopogon (ophiopogonin D, ~0.02-0.05% dry weight) contribute immunomodulatory effects. The decoction as a whole contains negligible macronutrients (protein <0.5g per serving, carbohydrates primarily from polysaccharides ~2-5g per decoction, fats <0.1g). Mineral content includes trace potassium, calcium, and magnesium leached from plant materials during decoction. Bioavailability of key compounds is moderate; berberine has low oral bioavailability (~5%) due to efflux transport, while salvianolic acids show better aqueous extraction efficiency (~60-80% recovery in decoction). The formula contains no significant vitamins, dietary fiber (insoluble fiber is removed in decoction), or substantial protein. Flavonoids and phenolic acids are the primary water-soluble bioactive compounds with estimated total phenolic content of approximately 15-40 mg GAE per 100ml of prepared decoction.
Preparation & Dosage
The recommended dosage is 9-15 grams per day as a decoction. Consult a healthcare provider before use.
Synergy & Pairings
Rhinoceros Horn, Rehmannia, Scrophularia
Safety & Interactions
Traditional formulations containing rhinoceros horn are now illegal and unsafe due to conservation concerns, with modern versions using water buffalo horn substitutes. The formula may interact with anticoagulant medications due to blood-moving herbs like red peony root. Contraindicated during pregnancy and in cases of yin deficiency without heat signs. Common side effects may include digestive upset and in rare cases, allergic reactions to individual herb components.