Use of Rou Gui (cinnamon bark) in TCM
Please note that you should never self-prescribe TCM ingredients. A TCM ingredient is almost never eaten on its own but as part of a formula containing several ingredients that act together. Please consult a professional TCM practitioner, they will be best able to guide you.
Preparation: Remove impurities and the exterior skin. Crush before use.
Dosage: 1 - 6 grams
Main actions according to TCM*: Warms the Spleen and Kidneys and tonifies the Yang. Expels Cold, Warms the meridians, promotes circulation of Qi and Blood and relieves pain. Used with tonics to assist in the generation of Qi and Blood.
Primary conditions or symptoms for which Rou Gui may be prescribed by TCM doctors*: Dyspnea Impotence Uveitis Sore throat Abdominal pain Diarrhea Amenorrhea Dysmenorrhea Loss of appetite
Contraindications*: This herb should not be used by those with Yin Deficiency with Heat signs or when there is Interior Heat; it should be used with extreme caution during pregnancy.
Common TCM formulas in which Rou Gui is used*
You Gui Wan
Source date: 1624 AD
Number of ingredients: 10 herbs
Formula key actions: Warms and tonifies Kidney Yang. Replenishes the Essence. Tonifies the Blood.
Conditions targeted*: Nephrotic syndromeOsteoporosis and others
Rou Gui is a king ingredient in You Gui Wan. Like the name indicates, it means it has more power than other ingredients in the formula.
Gui Zhi Jia Long Gu Mu Li Tang
Source date: 220 AD
Number of ingredients: 7 herbs
Formula key actions: Rectifies relationship between Yin and Yang. Harmonizes Heart and Kidney. Stabilizes and secures Essence.
Conditions targeted*: EnuresisUrinary incontinence and others
Rou Gui is a king ingredient in Gui Zhi Jia Long Gu Mu Li Tang. Like the name indicates, it means it has more power than other ingredients in the formula.
Nuan Gan Jian
Source date: 1624 AD
Number of ingredients: 8 herbs
Formula key actions: Warms the Liver and Kidneys. Promotes the movement of Qi. Alleviates pain.
Conditions targeted*: VaricoceleHydrocele and others
Rou Gui is a king ingredient in Nuan Gan Jian. Like the name indicates, it means it has more power than other ingredients in the formula.
In Nuan Gan Jian, Rou Gui is acrid, sweet, and very warming, entering the Liver, Kidneys and gate of vitality to generate the production of Yang at its
source.
Key TCM concepts behind Rou Gui's properties
In Traditional Chinese Medicine (TCM), Rou Gui belongs to the 'Herbs that warm the Interior and/or expel Cold' category. Herbs in this category are used for Internal Cold with Qi Deficiency and/or Yang Deficiency. In the Yin and Yang system of thought Yang is Hot in nature. A deficiency of Yang will therefore lead to Internal Coldness since there will as a result be more Yin (Cold in nature) than Yang. In extreme cases this can lead to so-called 'Yang collapse' with convulsions or coma and these herbs are particularly indicated to treat such scenarios.
As suggested by its category Rou Gui is Hot in nature. This means that Rou Gui typically helps people who have too much "Cold" in their body. Balance between Yin and Yang is a key health concept in TCM. Those who have too much 'Cold' in their body are said to either have a Yin Excess (because Yin is Cold in nature) or a Yang Deficiency (Yang is Hot in Nature). Depending on your condition Rou Gui can help restore a harmonious balance between Yin and Yang.
Rou Gui also tastes Pungent and Sweet. The so-called 'Five Phases' theory in Chinese Medicine states that the taste of TCM ingredients is a key determinant of their action in the body. Pungent ingredients like Rou Gui tends to promote the circulations of Qi and Body Fluids. That's why for instance someone tends to sweat a lot when they eat spicy/pungent food. On the other hand Sweet ingredients tend to slow down acute reactions and detoxify the body. They also have a tonic effect because they replenish Qi and Blood.
The tastes of ingredients in TCM also determine what Organs and Meridians they target. As such Rou Gui is thought to target the Heart, the Kidney, the Liver and the Spleen. In addition to regulating Blood flow, in TCM the Heart is believed to be the store of the 'Mind' which basically refers to someone's vitality. The Kidneys do not only regulate the urinary system but also play a key role in the reproductive system and the growth and aging process of the body. The Liver is often referred as the body's "general" because it is in charge of regulating the movements of Qi and the Body Fluids. It also takes a leading role in balancing our emotions. The Spleen assists with digestion, Blood coagulation and Fluids metabolism in the body.
Research on Rou Gui
5 g dose of Cassia cinnamon may reduce the peak blood glucose response and improve glucose tolerance following an oral glucose tolerance test.1
Sources:
1. Gutierrez JL, Bowden RG, Willoughby DS. ( 2016). Cassia Cinnamon Supplementation Reduces Peak Blood Glucose Responses but Does Not Improve Insulin Resistance and Sensitivity in Young, Sedentary, Obese Women. J Diet Suppl. , 13(4):461-71. doi: 10.3109/19390211.2015.1110222. Epub 2015 Dec 30.
Use of Rou Gui as food
Rou Gui is also eaten as food. It is used as an ingredient in dishes such as Cinnamon Buns or Hong shao rou.