Anemia stands as a prevalent and challenging nutritional issue on a global scale, impacting both developing and developed nations and carrying significant implications for human health, as well as social and economic progress. In the condition of Anaemia the total haemoglobin (Hb) level or number of red blood cells (RBCs) becomes poorly lowered ^[1].

Iron deficiency anaemia is characterized by incomplete synthesis of hemoglobin, leading to the formation of microcytic and hypochromic red blood cells. Insufficient hemoglobin levels compromise the blood's capacity to effectively transport oxygen to various cells and tissues throughout the body ^[2].

Children and women in their reproductive years face the highest susceptibility, with worldwide prevalence estimates indicating 47 percent of children under 5 years, 42 percent of pregnant women, and 30 percent of non-pregnant women aged 15–49 years experiencing anemia. The impact of anemia is significant, contributing to over 115,000 maternal deaths and 591,000 perinatal deaths annually on a global scale ^[2]. On a global scale, approximately one-third (33%) of women in the reproductive age bracket (15–49 years) are affected by anemia, indirectly putting the nutritional and health well-being of their children ^[3]. The highest prevalence of anaemia (56%) was found among pregnant women in low- and middle-income countries, and the lowest (24.1%) was reported among pregnant women in South America ^[4].

Therefore, to address this strategic gap, the researcher would like to conduct a participatory nutrition education and intervention on Iron rich diet study to improve the dietary behavior status, and reduce the prevalence of anemia among unmarried adolescent girls ^[1]. The main objective of the study was to assess the haemoglobin level among adolescent girls before nutrition education on Iron rich food. To assess the dietary practices among the adolescent tea garden Girls in selected Tea Garden of Nagaon District, Assam and to find out the effectiveness of Nutrition education on changing dietary practices among the adolescent girls of Tea Garden, Nagaon District Assam.The research approach is Descriptive Evaluative approach and Research design adopted was pre-experimental one group pre-test post-test design. The total sample for the study is 440. The data were collected from 11 numbers of different tea gardens of Nagaon District Assam. Simple random technique was used to to select the 11 tea gardens out of 30 numbers of tea gardens and study samples were selected by using non probability convenient sampling technique. The study results showed that there was high prevelance of anaemia among the adolescent girls of tea garden. It was found that, total 92.95% of study participants were having any type of anaemia with 28.63% mild, 56.36% moderate, 7.95% severe anaemia. The mean post test hemoglobin level was 10.70 gm/dl which was higher than the mean pre-test 10.03 gm/dl. There is significant association between the pretest level of Hb with the selected Demographic Variable such as religion, occupation of father, type of family, availability of toilet facility,sources of water, roaming without chappal as the tabulated value is less than the calculated value of Chi- square at s<0.05 level.