The incidence of atopic dermatitis has increased dramatically in this years. Atopic dermatitis occurs due to complex interactions between genetic and environmental factors. One of the genes that consistenly linked with AD occurences is filaggrin gene (FLG gene). Mutation on the gene can induce disruption in epidermal cytoskeleton aggregation which serves to form protein-lipid, thereby disrupting the skin permeability to water and outside particles such as allergens.8-14 Several attempts have been made to prevent the occurences and progressivity of AD, one of them is LCPUFA supplementation. Until now, the clinical and meta-analysis studies have shown inconsistent results, but LCPUFA intervention in early life gives more consistent and protective results. In this study investigators would like to know about the influence of FLG gene mutation to the occurrence of atopic dermatitis, to know the composition of LCPUFA in early life in order to see protective effects of several LCPUFA, to see the influences of FADS1 and FADS2 gene polymorphism towards LCPUFA concentration from buccal swab in early life and at the time AD occurs, to know about the diet at the time of AD occurrence, and to know the role of the ratio of DHA towards AA level in the development of AD due to their antagonistic effects, and to see the interactions between FLG gene, FADS gene and LCPUFA level in the development of AD.