Use of Gui Zhi (cinnamon twigs) 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, wash, soak in water, cut in thick slices and dry.
Dosage: 3 - 9 grams
Main actions according to TCM*: Adjusts the nutritive Ying and defensive Wei Qi. Relieves the Exterior through sweating. Warms and disperses Cold. Removes obstruction of Yang. Promotes the circulation of Yang Qi in the chest. Regulates and moves blood.
Primary conditions or symptoms for which Gui Zhi may be prescribed by TCM doctors*: Common cold Abdominal pain Amenorrhea Arthralgia Edema Palpitations Rheumatoid arthritis Dysmenorrhea
Contraindications*: Do not use for those with Warm febrile diseases, those who are showing Heat signs, and should be used with caution for women who are pregnant or are bleeding heavily.
Common TCM formulas in which Gui Zhi is used*
Gui Zhi Fu Ling Wan
Source date: 220 AD
Number of ingredients: 5 herbs
Formula key actions: Promotes Blood and lymphatic circulation, thus eleminates Blood Stagnation. Softens and resolves hard lumps such as cysts and fibroids.
Conditions targeted*: InfertilityDysmenorrhea and others
Gui Zhi is a king ingredient in Gui Zhi Fu Ling Wan. Like the name indicates, it means it has more power than other ingredients in the formula.
In Gui Zhi Fu Ling Wan, Gui Zhi unblocks the Blood vessels and reduces Blood Stagnation by promoting circulation.
Gui Zhi Shao Yao Zhi Mu Tang
Source date: 220 AD
Number of ingredients: 9 herbs
Formula key actions: Clears Heat and inflammations. Unblocks the flow of Yang Qi and promotes movement (in areas with painful obstruction). Clears Wind and Damp. Relieves pain.
Conditions targeted*: Rheumatoid arthritisConnective tissue disorders and others
Gui Zhi is a king ingredient in Gui Zhi Shao Yao Zhi Mu Tang. Like the name indicates, it means it has more power than other ingredients in the formula.
In Gui Zhi Shao Yao Zhi Mu Tang, Gui Zhi warms and unblocks the Channels.
Xiao Qing Long Tang
Source date: 220 AD
Number of ingredients: 8 herbs
Formula key actions: Releases the Exterior. Transforms Phlegm-Fluids. Warms the Lungs. Directs Rebellious Qi downward.
Conditions targeted*: Upper respiratory tract infectionsBronchitis and others
Gui Zhi is a king ingredient in Xiao Qing Long Tang. Like the name indicates, it means it has more power than other ingredients in the formula.
In Xiao Qing Long Tang, Gui Zhi releases the Exterior, opens the Blood vessels, and promotes Qi transformation.
Together with the other key herb in this formula, Ephedra (Ma Huang), the two herbs disperse Wind-Cold from the Exterior, promote water metabolism to remove Phlegm-Fluids, disseminate Lung Qi, and open the vessels to treat wheezing and body aches.
Key TCM concepts behind Gui Zhi's properties
In Traditional Chinese Medicine (TCM), Gui Zhi belongs to the 'Warm/Acrid herbs that release the Exterior' category. Herbs that release the Exterior aim to to treat the early stages of diseases that affect the upper respiratory tract, the eyes, the ears, the nose, the throat or the skin. TCM believes that External diseases such as colds or allergies can only invade the body if the External environment overwhelms our Wei Qi (the TCM version of the immune system). In order to counteract this invasion Warm/Acrid herbs aim to induce sweating by increasing the flow of sweat to our capillary pores. The belief is that this will expel the disease from the body and stop it from invading further.
As suggested by its category Gui Zhi is Warm in nature. This means that Gui Zhi tends to help people who have too much 'Cold' in their body, although with less effect than a plant that would be Hot in nature. 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 Gui Zhi can help restore a harmonious balance between Yin and Yang.
Gui Zhi 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 Gui Zhi 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 Gui Zhi is thought to target the Heart, the Lung 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. In addition to performing respiration, the Lungs are thought in TCM to be a key part of the production chain for Qi and the Body Fluids that nourish the body. The Spleen assists with digestion, Blood coagulation and Fluids metabolism in the body.
Research on Gui Zhi
5 g dose of Cassia cinnamon may reduce the peak blood glucose response and improve glucose tolerance following an oral glucose tolerance test.1
Both vivo and vitro results indicated Guzhi Fuling capsules (containing cinnamon twigs) possessed a significant spasmolytic effect on uterine titanic contraction.2
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.
2. Lan S, Liu L, Zong S, Wang Z, Zhou J, Xu Z, Ding G, Xiao W, Kou J. (2016) Traditional Chinese medicine Guzhi Fuling capsule used for therapy of dysmenorrhea via attenuating uterus contraction. J Ethnopharmacol 191: 273-279.
Use of Gui Zhi as food
Gui Zhi is also eaten as food.