Stanford Global Health Media Fellow Mira Cheng reported on a recent Lancet study that found that more than 1 billion people around the world now live with obesity.

This staggering statistic was reached earlier than anticipated, driven in large part by the rapid transition of malnutrition in the form of underweight to obesity in low-income and middle-income countries, she writes.

“Undernutrition and obesity are two faces of the same problem, which is the lack of access to a healthy diet,” Dr. Francesco Branca, director of the WHO Department of Nutrition and Food Safety, said in a news conference.

Learn more in Mira’s story.