A method and apparatus for detecting the presence of substances, compositions, constituents, proportionalities, of examined objects, and abnormalities and diseases associated with human tissue responsive to detected amplitudes and/or frequencies, such as resonant frequencies from the object/body being examined. Data in a database is utilized to identify the unbalanced condition, the foreign, toxic or harmful substance. The identified condition/substance may be used as an aid to select an appropriate treatment or corrective action.