A health care support system (1) acquires time-series data of heart rate; calculates a feature quantity relating to a second peak appearing after a first peak in which a peak of the heart rate appears first after start of a meal, for each partial data included in the time-series data of the heart rate; determines presence of a meal in the partial data using the feature quantity relating to the second peak calculated for each of the partial data; and estimates a meal time from the partial data determined to include a meal.
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