METHOD FOR MEASUREMENT OF EQUOL IN BIOLOGICAL SAMPLE BY IMMUNOASSAY, KIT FOR THE MEASUREMENT, AND METHOD FOR DETERMINATION OF EQUOL PRODUCTION ABILITY OF SUBJECT

摘要

An object of the present invention is to provide a method for measuring equal in a biological sample by an immunological method, a kit for the measurement, and a method for determining equol-producing ability of a subject. The measurement method of the present invention is characterized in that S-equol is used as at least one antigen selected from the group consisting of a standard antigen used for the preparation of a standard curve and a labeled antigen that competes with equol in a biological sample. The kit of the present invention is characterized in including S-equol as at least one antigen selected from the group consisting of the standard antigen and the labeled antigen. The determination method of the present invention includes steps of measuring equal in a biological sample derived from a subject who has ingested soybean isoflavane by an immunological method using S-equol as at least one antigen selected from the group consisting of the standard antigen and the labeled antigen, and determining an equol-producing ability of the subject based on the measured value of equol obtained in the above step.