Some science behind the scenes

Daidzein

Daidzein structurally belongs to the group of isoflavones.  It is a naturally occurring chemical.  It is also a phytoestrogen and thus of great interest currently in studies of the menopause, osteoporosis, infertility and so on.

Daidzein can be found in food such as soybeans and soy products like tofu and textured vegetable protein, a list below shows the other sources according to Dr Duke's phytochemical database.

The amount of any phytoestrogen in a plant is dependent upon the conditions in which it was grown, however, according to the USDA data the isoflavones in soybeans are—in general—37 percent daidzein, 57 percent genistein and 6 percent glycitein.   Soy germ contains 41.7 percent daidzein.

Plants Containing DAIDZEIN

Ordered by quantity

Species

Part

Quantity

Glycine max (L.) MERR. -- Soybean

Seed

328 ppm

 

Hypocotyl

190 ppm

 

Cotyledon

28 ppm

 

Testa

10 ppm

Genista tinctoria L. -- Dyer's Broom

Shoot

 

Phaseolus coccineus L. -- Scarlet Runner Bean

Plant

 

Psoralea corylifolia L. -- Babchi, Black Dot, Malaya Tea

Root

 

Pueraria montana subsp. var. lobata (WILLD.) MAESEN & S. M. ALMEIDA -- Kudsu, Kudzu

Root

 

Pueraria pseudohirsuta TANG & WANG -- Chinese Kudzu

Root

 

Sophora subprostrata CHUN & CHEN -- Shan Dou Gen

Root

 

Trifolium pratense L. -- Cowgrass, Peavine Clover, Purple Clover, Red Clover

Flower

 

Vigna radiata (L.) WILCZEK -- Green Gram, Mungbean

Plant