Final answer:
Belinda likely suffers from bulimia nervosa, an eating disorder involving binge eating and purging, and although it can have serious health effects, it is often less visible because sufferers may maintain a normal weight.
Step-by-step explanation:
Belinda, who is a typical 14-year-old engaging in secretive binge eating followed by purging through vomiting or using laxatives, most likely suffers from bulimia nervosa. This eating disorder is characterized by a cycle of bingeing on large amounts of food and then employing compensatory behaviors to avoid weight gain.
People with bulimia nervosa can experience serious health issues, including electrolyte imbalances and irregular heartbeat, and are often of normal weight, making the disorder less visible to others. While social factors such as cultural messages can contribute to the development of eating disorders, genetic predispositions can also play a significant role.