Synopsis

Source of validity: Traditional
Rating (out of 5): 1

Cassia bark (Cinnamomum cassia), also known as Chinese cinnamon, has a long history of use in traditional Chinese medicine (TCM) for various health conditions, including insomnia. In TCM, cassia bark (known as "Rou Gui") is considered warming and is often used to tonify kidney yang, disperse cold, and promote circulation. Insomnia in TCM is sometimes attributed to deficiencies or imbalances in kidney or heart yang energy, and cassia bark is believed to help restore balance and promote restful sleep as part of complex herbal formulas.

However, there is very limited scientific evidence to directly support the use of cassia bark for treating insomnia. Most of the available research focuses on cassia's antimicrobial, anti-inflammatory, and metabolic effects. While some laboratory studies suggest that certain cinnamon species may have mild sedative or anxiolytic properties in animal models, these findings are not robust, and usually involve species other than Cinnamomum cassia or use isolated compounds rather than the whole bark.

In summary, the use of cassia bark for insomnia is primarily justified by traditional practice rather than modern scientific validation. It is most commonly used as a component of multi-herb formulas in TCM rather than as a standalone treatment. Those considering its use should consult with a qualified healthcare provider, especially due to potential interactions and side effects associated with its high coumarin content.

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