In recent years, several studies have replicated the association between rs174547 in FADS1 gene and MetS components, as well as the interaction of rs174547 in FADS1 gene with dietary LA and ALA intake on MetS components among the general population in various ethnicities [19,24,25,26], but there are no published data among the vegetarians. The gene discussed is FADS1; the disease is metabolic syndrome.