Medicinal soybean, which has been proven to be effective in preventing cancer, heart disease, osteoporosis, and renal failure, is drawing people’s attention among other beans in recent days. This experiment was to examine the concentration of phenolic compounds and isoflavone in 53 kinds of soybeans cultivated and collected in Yeo-Ju, Gyeonggi-do region. The total average content of phenol is 29424.34㎍/g and the most and least phenol were detected in No. 35(814.98㎍/g) and No. 28(353.66㎍/g) respectively. Myricetin was detected the most resveratrol whereas detected the least amount which was less than 0.2% of the total amount among all medicinal soybean samples. Total average isoflavone content was 35910.56㎍/g and the most and least isoflavone was detected in No. 15 (996.66 ㎍/g ) and No.9 (476.18㎍/g )respectively . Malonylgenistin was detecteded the most genistein whereas detected the least amount which was less than 0.02 % of the total amount in all medicinal soybean samples. The result of this experiment is considered to be the basic data of the functional food manufacturing by utilizing domestic medicinal soybean.

Soybean(Glycine max(L.) Merill) is a good source of vegetable oil and high-quality protein. Soy foods have became popular food worldly because of its ingredients. Recently, as the well-being trends, the demand for soybean has increased in the West as well as in Asian countries. It contains valuable source of dietary isoflavones and phenolic compounds which are important secondary metabolites. The 33 germplasm cultivated in Yeoju, Gyeonggi-do region. The obtained results showed that isoflavones and phenolic compounds were significantly various. The highest compounds is malonyl genistin (230.89㎍𝑔-1), the lowest is genistin(0.70㎍𝑔-1) and the highest germplasm is Dunggeunseolitaekong (2222.60㎍𝑔-1) in isoflavone. In phenolic compounds, the highest compounds is myricetin (155.59㎍𝑔-1) and the lowest is vanillin (1.89㎍𝑔-1). Total containment of phenolic compounds is the highest in Dunggeunseolitaekong (803.76㎍𝑔-1) germplasm.