Obesity is abnormal or excessive fat accumulation that can impair health. Over 1.4 billion adults worldwide are overweight, including 200 million men and 300 million women. 65% of the world's population live in countries where obesity kills more people than being underweight. Low-income individuals are more likely to be obese than wealthy people, and there are more obese women and children under 5 than men. Potential causes of obesity include media influence, lack of exercise, unhealthy food access, upbringing, stress, depression, and lack of motivation.