Information provision method, information processing system, information terminal, and information processing method

An information processing system comprising:

• a server device;
• a sensor that includes a detector to detect 1-dodecanol discharged from a skin surface of a user and a controller configured to control said detector;
• and
• an information terminal,
• wherein the server device is configured to:
• acquire biological gas information presenting a concentration of 1-dodecanol of the user acquired by the sensor,
• obtain reference information representing an upper limit of a normal range of the concentration of 1-dodecanol per unit period of time, using a memory storing the reference information representing the upper limit of the normal range, and
• output information related to stress of the user to the information terminal after it is determined that a frequency that the concentration of 1-dodecanol of the user per the unit period of time is more than the upper limit of the normal range tends to increase, based on the biological gas information acquired in a pregnancy period of the user, and
• wherein the information terminal displays the information related to stress of the user on the display of the information terminal.

An information processing method using a computer, the method comprising:

• acquiring, via a network, biological gas information representing a concentration of 1-dodecanol of a user acquired by a sensor that includes a detector that detects 1-dodecanol discharged from a skin surface of the user and a controller configured to control said detector;
• obtaining reference information representing an upper limit of a normal range of the concentration of 1-dodecanol per unit period of time, using a memory storing the reference information representing the upper limit of the normal range;
• and
• outputting information related to stress of the user to display on a display the information related to stress of the user after it is determined a frequency that the concentration of 1-dodecanol of the user per the unit period of time is more than the upper limit of the normal range tends to increase, based on the biological gas information acquired in a pregnancy period of the user.