Genetics-some people are genetically slim and underweight
Eating disorders-some psychological disorders like anorexia nervosa affects eating habits.
Medical conditions like type 1 diabetes, celiac disease, and cancer may lead to weight loss.
There are many strategies to gain weight; follow these tips to gain a healthy weight.
Increase caloric intake:Eating more than your body requires is one way to gain weight. Determine how many calories you require according to your age and eat a surplus. Eating 300-500 calories more than you burn each day.