4. Dietary intake: Trained interviewers will collect 24-hr dietary recalls using standard methods starting at 6 months of age till 18 months. All the foods consumed in the 24 hours prior to interview will be recorded and portion sizes measured in local utensils. Recipes used to prepare foods will be recorded including the amounts of raw food used and the preparation methods. The foods will be coded by the research assistants and nutrient calculated in special purpose programs using the Bangladesh Food Composition Tables. Both nutrient intakes and food groups consumed will be analyzed and presented. Duplicate 24 hour recalls will be taken in a 10% subsample of respondents to assess within person variability and to allow adjustment of the prevalence of low intake nutrients.