Du Zhong

Eucommia ulmoides D. Oliver Du Zhong (bark) Pinoresinol-di-(3-D-glucoside, resin, aucubin, ajugoside, reptoside, harpagide acetate, encommiol.33 Improve liver and kidney function, lower blood pressure. 

Du Zhong (Eucomniae cortex), Gou Ji ("Cibotii rhizoma), Yi Zhi Ren (Alpiniae oxyphyllae fructus) and Tu Si Zi ("Cuscutae semen)... 

Du Zhong and Gou Ji strengthen the back and benefit the joints. They can be used in chronic Bi syndrome due to wind, cold and dampness with Kidney-Yang deficiency, especially in elderly people. 

Huai Niu Xi (Achyranthis bidentatae radix) and Du Zhong (Eucomniae cortex)... 

These two herbs are warm in nature and enter the Kidney meridian directly. They are able to tonify the Kidney-Yang. They have a strong point of strengthening the bones, and are often selected to treat a cold and weak back and limbs. Du Zhong is also able to tonify the Kidney, calm the fetus and prevent habitual miscarriage. 

Ren Shen and Fu Ling are used to tonify the Qi Rou Gui warms the Kidney Sang Ji Sheng, Du Zhong and Huai Niu Xi can strengthen the Kidney and relax the tendons. They are all used as assistants. 

Du-zhong (Eucommia ulmoides Oliv.) tea is commonly used in Japan in the treatment of hypertension and is thought to be a functional health food. In Japan, statistics published by the Ministry of Health and Welfare show that billions of Japanese yen are spent on Du-zhong each year, ranking Japan at the top in the consumption of this specific health food. According to ancient records,... 

Hsieh, C.-L. and Yen, G.-C., Antioxidant actions of du-zhong (Eucommia ulmoides Oliv.) toward oxidative damage in biomolecules, Life Sci., 66, 1387-1400, 2000. 

For habitual miscarriage, add Cortex Eucommiae Ulmoidis Du Zhong) and Semen Cuscutae (i u Si Zi). 

For low back and knee soreness and weakness, add Radix Dipsaci (Xu Duan) and Cortex Eucommiae Ulmoidis (Du Zhong). 

Dai, X., Q. Huang, B. Zhou, Z. Gong, Z. Eiu, and S. Shi. 2013. Preparative isolation and purification of seven main antioxidants from Eucommia ulmoides Oliv. (Du-zhong) leaves using HSCCC guided by DPPH-HPEC experiment. Food Chemistry 139(1-4) 563-570. 

Identification of Antioxidants from Du-Zhong Eucommia ulmoides Oliver) Directed by DPPH Free Radical-Scavenging Activity... 

In this study, we used a DPPH free radical scavenging activity directed identification process to pinpoint the antioxidants from the dried bark of Du-zhong and to elucidate their chemical structures as well as to compare their antioxidant capacities. 

Dried bark of Du-Zhong was purchased from a local Oriental store and it was imported from China. 

In summary, this DPPH directed fractionation and identification study resulted in the identification of two compounds from the dried bark of Du-Zhong, which show free radical scavenging activity. 

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