There are two main types of eating disorders - anorexia and bulimia is. Most diseases are similar to anorexia or bulimia but with slightly different characteristics. Recently, gluttony attracts attention of researchers and the media, but it is also a kind of eating disorder. Eating disorders frequently appear during adolescence or early adulthood, but some studies indicate that they may develop in childhood or vice versa later in adulthood. Women and girls are more likely than men to suffer from eating disorders. Men and boys according to various estimates ranging from 5 to 15 percent of patients with anorexia or bulimia and an estimated 35 percent of people who suffer from overeating. Eating disorders are real, treatable disease with complex psychological and biological causes. They often co-exist with other psychiatric disorders such as depression, substance abuse, or anxiety disorders. People with eating disorders also can suffer from numerous physiological complications, such as heart disease or kidney failure, which can lead to death.