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 |