introduction
soy, a plant in the pea family (fabaceae), has been common in asian diets for thousands of years. it is found in modern american diets as a food or food additive. 
 
common names—radix peaonia alba 
latin name ---- peaonia lactiflora pall.
specification paeoniflorin 10% 30% 80% hplc
traditional use
soybeans, the high-protein seeds of the soy plant, contain isoflavones, which are compounds similar to the female hormone estrogen. 
pharmaceutical clinical
•isoflavones are believed to have antioxidant properties. the soy isoflavone genistein also may increase the flexibility of blood vessels. 
•isoflavones are similar to synthetic estrogens like tamoxifen and ipriflavone, which have been shown to be effective in preventing or reducing bone loss. 
•one recent study showed that 60 g of soy protein isolate added to the daily diet substantially reduced the frequency of hot flashes in some postmenopausal women. 

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