To investigate the consumption of ultra-processed foods (UPF) based on the NOVA food classification, comparing the types of foods consumed between the age groups. A systematic review following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses. The articles were selected using the descriptors searched for MeSH in the databases: Pubmed / Medline, Lilacs and Scielo. 4,239 articles were selected in the initial research, 45 were included. The contribution of ultra-processed foods to the total amount of energy ranged from 15.0% to 54.7%, being greater in children and adolescents. For babies, this happens before the age of six months, consuming instant noodles, chocolate and stuffed cookies, expanding the variety of UPF foods as they age. For teenagers, the most consumed foods are soft drinks, pizza, gelatin, cakes, cookies, candies and hamburgers, in addition to those consumed in childhood. Among adults and elderly, the most consumed foods were bread, hot dog bread, sweet bread, sugary drinks, treats, cakes, cookies, pizza, snacks and sausages. UPF consumption varies according to the age group in Brazil, being higher among children and adolescents. The introduction occurs at the beginning of infant feeding and the types of UPF expands with increasing age.