According to data from Vigitel 2018 (Surveillance System of Risk and Protection Factors for Chronic Diseases by Telephone Survey), 19.8% of adults were obese (with the body mass index greater than or equals to 30Kg/m²). This rate is slightly higher among women (20.7%) than men (18.7%). The proportion of obesity among adults increased with age up to 44 years for men (25.8%) and up to 64 years for women (27.7%). In both sexes, the frequency of obesity decreased with increased education, notably for women (Brazilian Ministry of Health, 2018h).

References:

Brazilian Ministry of Health. (2018h). Vigitel Brasil 2018: Vigilância dos fatores de risco e proteção para doenças crônicas por inquérito telefônico. http://portalarquivos2.saude.gov.br/images/pdf/2019/julho/25/vigitel-brasil-2018.pdf