Inclusion Criteria:  Children with Maya ethnicity confirmed by having parents and grandparents belonging to the same community, and three generations living in the community. Children enrolled in 3th and 4th year of elementary school from the same educational center, volunteers, who have the informed consent signed by their parents or tutors, and the assent letter signed by children. Aged between 8 to 10 years. Both genders.  Exclusion Criteria:  Any child who does not want to participate in the study. Children whose parents or tutors do not agree to sign the informed consent. Children who do not sign the assent letter. Age less than 8 years and older than 11 years. Children using antihypertensive, hypoglycemic or lipid-lowering medications, as well as those that have a history of a condition affected by glucose metabolism, insulin or that alter body composition (cancer, chronic infections, food allergy). Under treatment of intake of supplements with vitamins, minerals, antioxidants (<2 months). Children with alcoholism or smoking.