Cinnamon bark (Rou Gui) in Chinese Medicine

Cinnamon bark

Chinese: 肉桂

Pinyin: Ròu Guì

Parts used: Dried stem bark

TCM category: Herbs that warm the Interior and/or expel Cold

TCM nature: Hot

TCM taste(s): PungentSweet

Meridian affinity: SpleenHeartKidneyLiver

Scientific name: Cinnamomum cassia

Other names: Chinese cassia

Use of cinnamon bark (Rou Gui) 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 cinnamon bark 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 cinnamon bark are used*:

Key TCM concepts behind cinnamon bark (Rou Gui)'s properties

In Traditional Chinese Medicine (TCM), cinnamon bark are plants that belong to the 'Herbs that warm the Interior and/or expel Cold' category. Herbs in this category are used for Internal Coldness with Qi and Yang Deficiency. In the Yin and Yang system of thought (see our explanation on Yin and Yang) 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 cinnamon bark are plants that are Hot in nature. This means that cinnamon bark typically help 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 cinnamon bark can help restore a harmonious balance between Yin and Yang.

Cinnamon bark also taste Pungent and Sweet. The so-called "five elements" theory in Chinese Medicine states that the taste of TCM ingredients is a key determinant of their action in the body. Pungent ingredients like cinnamon bark tend 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 cinnamon bark are thought to target the Spleen, the Heart, the Kidney and the Liver. In TCM the Spleen assists with digestion, blood coagulation and fluid metabolism in the body. In addition to regulating blood flow, the Heart is believed to be the store of the "spirit" 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 body fluids. It also takes a leading role in balancing our emotions.

Research on cinnamon bark(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


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 cinnamon bark (Rou Gui) as food

Cinnamon bark are also eaten as food. It is used as an ingredient in dishes such as Cinnamon Buns or Hong shao rou.