The method involves selecting a set of time intervals from a time period, where the time intervals extend over one hour. A stability parameter is determined for the time intervals by evaluating the measuring data, which lie in the relevant time interval. The stability parameter characterizes temporal dynamics, where the concentration of the dynamics changes in the time interval. The stability parameter is evaluated to determine illness-conditioned characteristics of metabolism. Independent claims are also included for the following: (1) a computer program product directly loaded in a memory of a digital computer and including a software step for evaluating a series of measuring data (2) a system for examining metabolism of a human or an animal regarding a medical significant analyte.