[Objective] To explore the difference of nutritional quality of yogurt kept in refrigeration(4 ℃) and frozen(-20 ℃) conditions.[Method] The appearances,acidity,protein content,lactic acid bacteria content of yogurt kept in refrigeration(4 ℃) and frozen(-20 ℃) conditions were compared.[Result] The appearances of yogurt kept in frozen condition were significantly better than that kept in refrigeration condition from the third day.The protein content was not significantly different among the two conditions.The...