Dietary guidelines based on 5 food groups was used as a main nutrition education tool until 1996 when food based dietary guidelines (FBDGs) were promoted after 2 years of formulation and development. These FBDGs for the general population were designed to promote desirable and culturally acceptable eating behavior. The nine qualitative guidelines of Thai FBDGs include: 1. eat a variety of foods from each of the five food groups and maintain proper weight, 2. eat adequate rice, or alternate carbohydrate, 3. eat plenty of vegetables and fruits regularly, 4. eat fish, lean meats, eggs, legumes and pulses regularly, 5. drink sufficient amount of milk every day, 6. take moderate amounts of fat, 7. avoid excessive intake of sweet and salty foods, 8. eat clean and uncontaminated foods, and 9. avoid or reduce consumption of alcoholic beverages. In 1998, the quantitative part of Thai FBDGs or food guide model was established as "Nutrition Flag" after rigorous test for understanding and acceptability among consumers. Promotion and dissemination of the Thai FBDGs have been carried out at national and community levels through basic health, agricultural and educational services and training activities, as well as periodic campaigning via multiple communication channels and media. Recently in 2009, the FBDGs for infant and preschool children were introduced to replace the previous infant and young child feeding guidelines. There has been no formal evaluation on the impact of promotion of the Thai FBDGs but some periodic testing of knowledge and practices have shown positive results.