Dr. J Says is a web-based application that recommends personalized meal combinations from available menu items based on a user's health profile. These recommendations are generated using an algorithm created by modifying the knapsack model in optimization theory so as to extend its scope to multidimensional resource constraints (Leung, 2004). The feasible region for these constraints is defined by calorie, carbohydrate, fat, protein and fiber recommendations specified by the various organizations like the Centers for Disease Control and Prevention and the Institute of Medicine in their position statements regarding a healthy diet. Our algorithm when applied to a data set of available menu choices outputs meal combinations that best fit the complex guidelines specified by the chosen medical organization. Knapsacking as well as further immediate extensions of the model have extensive applications in domains like operations research, supply chain management and we use it here for the first time to recommend healthy meal choices. This technology is currently available to diners at the Georgia Institute of Technology dining halls as a touch screen kiosk at the dining hall. Users log in with their unique IDs to receive a set of meal combinations from the days menu that will help them achieve the dietary goals specified by them in their health profile.
Please visit the Dr. J Says or Usable Health website to learn more.
