There are differences in the contents of various chemical components among processed products of Rhubarb to some extent.The efficacy of the drug can also alter significantly.The relevant literature on the comparison between various processed products of rhubarb at home and abroad was sorted and analyzed.Tannins,free anthraquinones,combined anthraquinones and flavonoids were taken as the research objects,and the differences in chemical composition and efficacy between different processed products of rhubarb were reviewed.
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