Nutritional allergies, like other atopic diseases, are more common in developed countries, and occur at an earlier age with 2-10% prevalence. From more than 170 foodstuffs that cause an allergic reaction, 90% refers to the following food allergens: cow's milk, eggs, wheat, soy, nuts, fish and peanuts. The main purpose of this study was to compare the nutritional status of patients with food allergy at the time of the diagnosis with a healthy control group, and to compare the nutritional status of children wih food allergy prior and after 6 months of elimination diet. The specific aim of this study was to examine the quality of nutrition in children on elimination diet and to compare it to healthy control group without dietary restrictions. Other aim was to examine the implementation of the elimination diet in relation to the number and type of food allergens. This controlled, prospective, longitudinal study involved 62 patients with nutritional allergy (age 3 – 8 months) and 52healthy participants (at the age of 8 months). Nutritional status of children with food allergies was assesed within 24 hours after diagnosis, and after 6 months on elimination diet. Nutritional status of the control group was assesed during general medical examination. Methods for determining the nutritional status are: antropometric, biochemical, dietary and anamnestic interviewing. At the time of diagnosis our respondents with nutritional allergy showed a decreased body mass when compared to healthy control group, while biochemical indicators and dietary intake of nutrients were not significantly different compared to healthy control. After 6 months on elimination diet, the nutritional status of our respondents has been deteriorated compared with the dietary intake before starting elimination diet, and dietary intake of energy, lipids, calcium, zinc, selenium and vitamin E, D, C and B complexes was not adequate. Although the number and type of food allergens did not influence the nutritional status of children who have excluded three or more foods from their diet, the intake of most micronutrients was significantly disrupted, suggesting inadequate and long-term diet that might have a negative impact on the child's growth and development. Since the intake of energy and nutrients is reduced during the elimination diet, children with nutritional allergy require nutritional supervision and careful monitoring of the nutritional status.