Background and purpose: Nowadays. increasing body mass index (BMI) in adolescents that is caused by different factors is a major health threat in communities. This study aimed to determine the BMI of students and associated factors in 5 Iranian ethnic groups. Materials and methods: This cross-sectional study was conducted in high school students aged 12-14 years. https://parisnaturalfoodes.shop/product-category/kyo-dophilus/