South Korea’s waistlines are expanding – and nowhere is it showing more than around the belly. A new “2025 Obesity Fact Sheet” from the Korean Society for the Study of Obesity (KSSO) reveals that 42% of people in their thirties and forties now have abdominal obesity – dangerous “active fat” wrapped around the liver, pancreas and intestines that drives diabetes, heart disease and other chronic illnesses.
The 10-year data analysis led by Professor Han Kyung-do of Soongsil University paints a stark picture: adult obesity climbed from 31% in 2014 to 38% in 2023. Men shot up from 39% to 50%; women nudged from 24% to 28%. Severe obesity (BMI ≥35) now hits 3 in 100 young men and 2 in 100 young women.
Even more troubling, obesity is becoming a family affair. Kids with two obese parents are nearly six times more likely to be obese themselves – and for girls, the risk spikes almost seven-fold. Boys tend to mirror their fathers’ weight; girls, their mothers’. Among teenage girls, overweight rates soar at 16 and peak at 27% at age 17.
Han calls it a “serious public health issue” and warns that obesity is shifting from a personal lifestyle matter to an intergenerational health inequality.
The fact sheet also shows how obesity multiplies disease risks: 2.1× higher for diabetes, 3.1× for metabolic syndrome, 5.2× for obstructive sleep apnoea and more. Obese women are also 1.3× more likely to suffer depression.
Now in its 10th year, the KSSO report urges tighter BMI definitions, better genetic and cancer data integration and stronger prevention programs for adolescents. The goal: stop Korea’s growing waistlines before today’s numbers lock in tomorrow’s health crisis.
