Old ancient soybean,Soy and the dissemination,cultivation.

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Soy Components:8.4).Soy phytoestrogens.

Soy Bean Extract INCI Name Glycine Soja Extract CAS 84776-91-0 Soy isoflavones Genistein CAS 446-72-0 Daidzein CAS 486-66-8 Glycine max L extract photo picture image Soybeans and soy foods are major sources of dietary phytoestrogens.

 The main group of phytoestrogens in soybeans is the isoflavones. The coumestan, coumestrol, occurs in small amounts in the beans (but in large amounts in soybean sprouts).

 In soy and other plants, isoflavones occur principally in the form of glycosides.

 The principal isoflavone glycosides in soy are genistin and daidzin; the corresponding aglycones are known as genistein and daidzein. Soybeans contain approximately three times as much genistin as daidzin.

 Glycitein 7-O-b-glucoside is a third isoflavone glycoside in soy. It is present in soybeans in smaller amounts than daidzin.

 Isoflavones appear to play several different roles in plant physiology. Some isoflavones, at least, act as antimicrobial defence compounds.

 The major soybean isoflavones, genistein and daidzein, are inducers of nodulation genes in the nitrogen fixing bacterium Bradyrhizobium, which forms nodules on soybean roots.

 However, it is the biological activity of isoflavones in mammals that has caused most excitement in recent years.

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citations1.Old ancient soybean,Soy and the dissemination,cultivation.

last edit date:5th,June.2009.