Brazil faces surge in insulin resistance and sweet cravings

Brazil's adult diabetes prevalence more than doubled, rising from 5.5% in 2006 to 12.9% in 2024, while obesity increased 118% and overweight 47% over the same period, according to the Ministry of Health’s Vigitel 2025 report. The International Diabetes Federation estimates 16.6 million Brazilian adults aged 20‑79 had diabetes in 2024, placing the country among the ten with the highest case numbers worldwide and projecting up to 24 million by 2050.

Experts warn that many individuals experience early signs of insulin resistance before a formal diagnosis. Symptoms such as post‑meal fatigue, persistent sweet cravings, abdominal fat accumulation, frequent hunger, and elevated blood pressure can indicate the body’s compensatory overproduction of insulin. Alexandre Duarte, professor of metabolic physiology, says, “The mistake is waiting for glucose to rise before investigating the metabolism.”

Research on the drive for sugary foods highlights the role of brain reward circuits, hormonal regulation, and lifestyle factors. Nutritionist Adriana Stavro notes that fluctuations in insulin, leptin, ghrelin and cortisol—affected by diet quality, sleep, stress and circadian rhythms—can intensify cravings for high‑sugar, high‑fat foods. Understanding these mechanisms is seen as essential for preventing progression to type 2 diabetes and related cardiovascular risks.