I am m 24..5'5height. n weight only 50kg.hw i can gain it i easiest way?

Weight gain: If one is truly underweight (based on height, family background, and body type), a Dr. can evaluate for a hormonal, digestive, or other disorder. If no medical cause is found, then one can add weight by eating more calories of nutritious foods: proteins: egg white, chicken breast, salmon. Better fats: olive oil, peanuts, almonds, tofu. Sometimes it's very hard to gain weight because of genetics.