Abstract: In an information providing method, purchase data indicating a purchase history of a control customer is acquired, and a merchandise category to which at least one merchandise belongs is determined from the purchase data. In this method, an extent of a potential health symptom of a target customer is further predicted using a health predictive model having the merchandise category to which at least one merchandise included in the purchase history belongs and an extent of the health symptom correlated therein, and the merchandise category. In the method, health information indicating the extent of the predicted health symptom is provided to the target customer.