Eucommia / Du Zhong or the hardy rubber tree is used for its inner bark. Eucommia ulmoides is the scientific name of this rubber tree. The name refers to a Taoist monk who was said to be immortal, suggesting that the herb provides long life, good health and vitality. The tree is a member of the rubber family and is found in the Sichuan, Yunnan, Guizhou and Hubei provinces of China. Mature trees can reach a height of 50 feet; however, the tree is not killed to obtain the bark. Instead, small patches are peeled away from trees over 10 years old in the late summer and early autumn. The inner bark contains a white, rubbery liquid that accounts for Eucommia / Du Zhong's healing properties.
Traditionally only the bark of the Eucommia / Eucommia ulmoides was used for healing. Research in the late 90s in Japan indicated that the leaves also have healing properties.
Actions & Indications:
In traditional Chinese medicine, Eucommia / Du Zhong bark has sweet, warm properties. It strengthens the liver and kidneys, and is considered the primary herb used to increase yang functions in the body. Eucommia bark is the primary herb used to heal tissues that are slow to mend after an injury or that have weakened through stress or age. It is given to treat lower back and leg pain, stiffness, arthritis, and knee problems including continual dislocation. Eucommia bark is also believed to have diuretic properties that aid in reducing swelling. Although it can be used alone, eucommia bark is most often used in conjunction with other herbs that support its functions. In addition to its healing effects, eucommia has the ability to lower blood pressure; most Chinese formulas used to lower blood pressure contain at least some amount of eucommia. It is also given to pregnant women to calm the fetus and prevent miscarriage.
Du Zhong
