An example information processing system performs an analysis relating to health of a user based on biological information of the user so as to provide information to the user based on a result of the analysis. The information processing system updates, for each user, at least a part of a rule for deciding information to be provided based on the biological information. Thus, the information processing system can provide information that is useful for the user. Note that the update of the rule is performed based on the biological information of the user that is obtained after the provision of the information, for example.
