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This formula is based on a modification of Zhang Zhong-jing’s Xiao Chai Hu Tang (Minor Bupleurum Decoction) from his late Han dynasty Shang Han Lun (Treatise on Damage [Due to] Cold). It was created by Gan Guo-dong and Huang Qiu-xing from the Shunde Municipal Integrated Chinese-Western Medical Hospital. Our version is a 9:1 extract. 500mg 60 capsules.

"Cold Quell is the best Chinese patent medicine ever I've used. Period."
Jim Butler, L.Ac.
Arlington, VA