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Why is cinnamon twig (Gui Zhi) used in traditional Chinese medicine instead of cinnamon bark (Gui Pi)?

Nov 05, 2024 Source: Cainiu Health
Dr. Zhang Xiuhong
Introduction
Generally speaking, there is no such saying as "why Chinese medicine uses Ramulus Cinnamomi (guizhi) instead of Cortex Cinnamomi (guipi)." The main reasons for using guizhi rather than guipi in traditional Chinese medicine include differences in their sources, applications, therapeutic effects, pharmacological actions, and variations in safety and toxicity. In clinical practice, TCM practitioners flexibly adjust the composition of herbal formulas and dosage according to each patient's specific condition.

Generally speaking, there is no such saying as "why Chinese medicine uses Ramulus Cinnamomi (Guizhi) instead of Cortex Cinnamomi (Guipi)." The main reasons for using Guizhi rather than Guipi in traditional Chinese medicine include differences in source, usage, therapeutic effects, pharmacological actions, and safety and toxicity profiles. A detailed analysis is as follows:

1. Different sources: Guizhi refers to the young twigs of the cinnamon tree, which contain higher levels of active ingredients and medicinal compounds. Guipi, on the other hand, refers to the bark of the cinnamon tree, typically harvested from the trunk and main branches, and has relatively weaker medicinal potency.

2. Different uses: Guizhi is primarily used in traditional Chinese medicine. Due to its properties of warming the meridians, dispelling cold, and relieving pain, it is commonly prescribed for conditions such as wind-cold感冒, joint pain, and similar symptoms. Guipi is mainly used in cooking to enhance flavor and aroma in dishes such as braised meats and marinated foods, and has relatively mild medicinal effects.

3. Different therapeutic effects: Guizhi has functions of warming the meridians to dispel cold, promoting sweating to resolve exterior patterns, and invigorating blood circulation to remove blood stasis. Guipi serves to warm the interior, dispel cold, regulate qi, and harmonize the stomach.

4. Different pharmacological actions: Guizhi can dilate blood vessels, increase coronary and cerebral arterial blood flow, and reduce vascular resistance. Guipi primarily acts on the digestive system, exerting a strong effect in warming the middle jiao and dispelling cold.

5. Differences in safety and toxicity: Guizhi is considered a relatively safe herbal medicine, with few adverse reactions when used at conventional doses. It can be incorporated into various formulas, and dosages can be flexibly adjusted according to the patient's condition and constitution. Guipi contains certain toxic components, and excessive use may lead to toxic reactions.

In clinical practice, TCM practitioners will flexibly adjust formula composition and drug dosages based on individual patient conditions to achieve optimal therapeutic outcomes.

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