To enable a user to grasp which of a
dietary habit improvement and an increase in
momentum is effective for weight losses.SOLUTION: In an
information processing system, a
control unit inputs, as an explanatory variable, at least one of body measurement information, biological sample information, and answer information of a discretionary user to a first trained model having been trained using, as an objective variable, at least one of body measurement information, biological sample information, life habits,
health condition, and answer information to a questionnaire concerning personality of subjects for whom a dietary effect due to a
dietary habit improvement is observed, and using, as an object variable, a first
predictive value indicating a level of dietary effects, so as to acquire a first
predictive value outputted from the first trained model. The
control unit further acquires a second
predictive value outputted from a second trained model having been trained using, as an explanatory variable, at least one of the body measurement information, the biological sample information, and the answer information of subjects for whom a dietary effect due to an increase in
momentum is observed. Then, the
control unit generates proposal information for proposing a
dieting method to the user on the basis of a result from comparison of the predictive values.SELECTED DRAWING: Figure 6