Abstract: A method of determining the health condition of a living creature comprises the steps of detecting a selected physiological characteristic, e.g. the conductivity of the skin, of the living creature at a statistically significant plurality of measuring points distributed over a defined body portion of the living creature, determining, e.g. by means of a computer, the statistical distribution of the measured values and comparing the statistical distribution of the measured values to a reference statistical distribution of the selected physiological characteristic. The said reference statistical distribution is a logarithmic distribution which is determined according to the calculating methods of statistics by means of the computer directly from the measured values obtained for the individual tested living creature. The invention for the first time permits a reliable indication as to overall health condition of a human or animal.