Daidzein sources

Fig. 1.14 LC-MS analysis of a mixture of daidzein and acetophenone with a ESC source (A) ESI, (B) APCI, (C) photo diode array detection.

Kaufman, P.B., Duke, J.A., Brielmann, H., Boik, J., and Hoyt, J.E. 1997. A comprehensive survey of leguminous plants as sources of the isoflavones, genistein and daidzein implications for human nutrition and health. J. Alternate Complementary Med. 3 7-22. 

Fermented soy such as tempeh, miso, and tamari are healthy sources of both genistein and daidzein. Soy also contains two other antitumor compounds beta-sitosterol and Bowman-Birk inhibitor. 

Kudzu (Pureria lobata) is known as "the vine that ate the South." Yes, there are uses for this highly aggressive weed. The root is commonly used in Chinese medicine as a heart tonic, demulcent, and antispasmodic, and to reduce alcohol consumption. It also is a rich source of daidzein. 

Red clover (Trifolium pratense) is a rich source of genistein and daidzein as well as two other important phytosterols, biochanin and formononetin. It has traditionally been used as an alterative, as a lymph and liver tonic, and to prevent and to treat various cancers. 

Note 86 university students (54 females and 32 males) ate 2 g/body weight of unprocessed, boiled, natural soybeans for seven consecutive days. Actual serum levels of daidzein and genistein, TSH free thyroid hormones, and autoantibodies to thyroid peroxidase and thyroglobulin were measured before, at the end, and 7 days after controlled soy consumption. The table provides an extract from Pearson s correlation matrices. Data from significant correlations (p < 0.05) in at least one subgroup of subjects in at least one stage of the experiment. NS means not significant other symbols are the same as in the previous tables. Source Reproduced from HampI eta/. (2007). 

Isoflavones are found almost exclusively in leguminous plants. Legumes, particularly soybean (Glycine max L.) and its processed products, are the richest sources of isoflavones mainly genistein, daidzein, and glycitein, in the human diet." Recently soy isoflavones have been reported also in 2-3... 

SSF, solid-state fermentation. Aglycons (daidzein, genistein) were 100% accessible in vitro. Source-. Data from Mo etal. (2013). 

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