Obesity is a growing global challenge, with nearly one billion people worldwide classified as obese. Obesity rates are rising across countries like the UK and US, where over one-third of adults are affected. Obesity is caused by a combination of genetic and environmental factors like overeating high-fat foods, physical inactivity, and social determinants. Beyond physical health risks, obesity is also linked to mental health issues and reduced quality of life. While concerning, the document provides hope by emphasizing it's never too late to make lifestyle changes like exercise, diet, and sleep to combat obesity.