Abstract: A method for re-hydration of an individual is provided. The method obtains biometric information of the individual and inputs it into a processing means. An algorithm determines an amount of fluid to be injested by the individual and a time period using the biometric information. A value of the amount of fluid is displayed. After receiving an indication of fluid being ingested by the individual, the process waits for the time period. Then, an additional amount of fluid to be ingested by the individual is determined. A value of the additional amount of fluid is displayed. The process returns to the determining an amount of fluid after receiving an indication of a diarrhea event. The process pauses for a period of time after receiving an indication of a vomiting event and returns to the determining an amount of fluid.