Dietary assessment
A 24-h dietary recall will be taken to assess the dietary pattern of the residents by a dietitian at baseline, follow-up, and endpoint. Food portion sizes will be obtained using standard household measures such as plates, bowls, cups, glasses, and different spoons. The energy content of each food component will be calculated using standard energy values for the portion sizes. The daily energy intakes are to be calculated using NutriSurvey 2000 software. Furthermore, it will be analyzed for macro and micronutrients using NutriSurvey Software modified with Sri Lankan food composition data.