Hermetica Superfood Encyclopedia
The Short Answer
Rou Gui (Cinnamomum cassia bark) contains cinnamaldehyde as its primary bioactive compound, which stimulates digestive secretions and enhances gastric motility. It improves cardiovascular health by promoting vasodilation and reducing peripheral vascular resistance through calcium channel modulation.
CategoryTraditional Chinese Medicine
GroupTraditional Chinese Medicine
Evidence LevelModerate
Primary Keywordrou gui benefits
Synergy Pairings5
Rou Gui (Cinnamomum cassia bark) — botanical close-up
Health Benefits
Rou Gui enhances digestive health by stimulating gastric secretions and reducing gut inflammation. It contains cinnamaldehyde that improves digestive efficiency. - It supports cardiovascular health by improving blood circulation and reducing blood pressure. Rou Gui contains compounds that enhance vascular function. - Rou Gui boosts immune function by enhancing the activity of white blood cells. This strengthens the body's defense against infections. - It acts as a powerful antioxidant, protecting cells from oxidative stress. This helps in preventing chronic diseases and aging. - Rou Gui supports joint health by reducing pain and swelling in arthritis. It inhibits the production of pro-inflammatory cytokines. - It improves cognitive function by enhancing memory and concentration. Rou Gui increases blood flow to the brain, supporting neural health. - Rou Gui promotes skin health by reducing acne and improving skin texture. Its antimicrobial properties help in preventing skin infections.
Origin & History
Natural habitat
Rou Gui, or Cinnamomum cassia bark, is derived from the bark of the cassia tree, native to China. The bark is harvested and dried for use in traditional remedies.
“Rou Gui has been used in Chinese medicine for centuries as a warming herb, often included in formulas to treat cold-related ailments.”Traditional Medicine
Scientific Research
Studies have shown that Rou Gui may help regulate blood sugar levels and improve circulation. Some research supports its use in managing metabolic conditions.
Preparation & Dosage
Traditional preparation
Rou Gui is used in powdered form or as a decoction. Dosages range from 1.5 to 4.5 grams per day. Consult a healthcare provider before use.
Nutritional Profile
Rou Gui (Cinnamomum cassia bark) is primarily used in small medicinal quantities (1-9g per day in TCM practice), so macronutrient contribution is minimal. Per 100g of dried cassia bark: Carbohydrates approximately 80g (predominantly dietary fiber and polysaccharides), Dietary fiber approximately 53g, Protein approximately 4g, Fat approximately 1.2g, Calories approximately 247 kcal. Key micronutrients per 100g: Manganese approximately 17.5mg (875% DV - notably high), Calcium approximately 1002mg, Iron approximately 8.3mg, Magnesium approximately 60mg, Potassium approximately 431mg, Phosphorus approximately 64mg, Vitamin K approximately 31mcg, Small amounts of Vitamin C (approximately 3.8mg) and B vitamins including niacin (approximately 1.3mg). Primary bioactive compounds: Cinnamaldehyde (the dominant volatile compound, comprising 55-90% of essential oil content, approximately 10-25mg/g of bark), Coumarin (cassia-specific compound, approximately 2.1-4.4mg/g - significantly higher than Ceylon cinnamon, relevant for safety dosing), Cinnamate esters and cinnamic acid (approximately 1-5mg/g), Procyanidin-type tannins and condensed tannins (approximately 1-12% by weight), Polyphenolic compounds including quercetin and kaempferol glycosides (approximately 0.5-2mg/g), Eugenol (approximately 1-5% of essential oil), Trans-cinnamic acid (approximately 0.5mg/g), Diterpenes including cinncassiols A-E. Bioavailability notes: Cinnamaldehyde is rapidly absorbed through gastrointestinal mucosa and partially metabolized to cinnamic acid in the gut. Coumarin bioavailability is high (approximately 70-80% oral absorption), which is clinically relevant due to potential hepatotoxicity at high doses - European Food Safety Authority recommends limiting coumarin intake to 0.1mg/kg body weight per day, making high-dose cassia supplementation a consideration. Polyphenols have moderate bioavailability (15-30%) and undergo extensive gut microbiome metabolism to bioavailable phenolic acids. Fat-soluble compounds including essential oil constituents have improved absorption when taken with food containing dietary fats. The tannin content may reduce iron and protein bioavailability from co-consumed foods.
How It Works
Mechanism of Action
Cinnamaldehyde in Rou Gui activates TRPA1 channels in the digestive tract, stimulating gastric acid secretion and enhancing gut motility. It modulates L-type calcium channels in vascular smooth muscle, promoting vasodilation and improving blood flow. The compound also inhibits inflammatory cytokines like TNF-α and IL-6 through NF-κB pathway suppression.
Clinical Evidence
Human studies on Cinnamomum cassia show modest benefits for metabolic health, with one 12-week trial (n=60) demonstrating 10-15% reductions in fasting glucose. A systematic review of 8 trials found significant improvements in systolic blood pressure (average 6.2 mmHg reduction). However, most digestive health claims rely on traditional use and animal studies rather than robust clinical trials. Evidence quality remains moderate due to small sample sizes and methodological limitations.
Safety & Interactions
Rou Gui is generally safe at typical dosages (1-6g daily) but contains coumarin, which may cause liver toxicity with prolonged high-dose use. It can potentiate anticoagulant medications like warfarin, increasing bleeding risk. The herb may lower blood sugar, requiring monitoring in diabetic patients taking glucose-lowering drugs. Pregnant women should avoid therapeutic doses due to potential uterine stimulant effects.
Synergy Stack
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Also Known As
Cinnamomum cassiaChinese CinnamonCassia BarkGui ZhiBastard CinnamonChinese CassiaCassia Cinnamon
Frequently Asked Questions
What is the active compound in rou gui?
Cinnamaldehyde comprises 75-90% of rou gui's essential oil and is responsible for most therapeutic effects. Other active compounds include cinnamic acid, coumarin, and various terpenes that contribute to its warming properties.
How much rou gui should I take daily?
Traditional Chinese medicine typically uses 1-4.5g of rou gui powder daily, divided into 2-3 doses. For standardized extracts, 200-400mg daily is common, though optimal dosing requires professional guidance.
Can rou gui lower blood pressure?
Clinical studies show rou gui can reduce systolic blood pressure by 3-6 mmHg through vasodilation effects. However, results vary significantly between individuals and it should not replace prescription antihypertensive medications.
Is rou gui the same as regular cinnamon?
Rou gui (Cinnamomum cassia) differs from Ceylon cinnamon (Cinnamomum verum) in having higher cinnamaldehyde content (75-90% vs 50-60%) and significantly more coumarin. It has a stronger, more pungent flavor and different therapeutic properties.
What are rou gui side effects?
Common side effects include mouth irritation, stomach upset, and potential allergic reactions in sensitive individuals. High doses may cause liver stress due to coumarin content, and it can interact with blood thinners and diabetes medications.
Does rou gui interact with blood pressure medications?
Rou gui may have additive effects when combined with blood pressure-lowering medications due to its natural vasodilatory properties. If you are taking antihypertensive drugs, consult your healthcare provider before supplementing with rou gui to avoid excessive blood pressure reduction. Your doctor may need to monitor your blood pressure more closely or adjust your medication dosage.
Is rou gui safe during pregnancy and breastfeeding?
Rou gui is traditionally avoided during pregnancy due to its warming properties and potential uterine stimulant effects. There is insufficient clinical evidence on rou gui's safety during breastfeeding, so it is best to consult with a healthcare provider before use. Pregnant and nursing women should err on the side of caution and seek professional medical guidance.
What does scientific research say about rou gui's digestive benefits?
Clinical studies demonstrate that rou gui's cinnamaldehyde compound stimulates gastric secretions and improves digestive enzyme activity, supporting its traditional use for digestion. Research shows it may help reduce intestinal inflammation and improve overall gut function, though more large-scale human trials are needed. The evidence is moderately strong for digestive support compared to other traditional uses, but results vary based on dosage and individual response.
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