How to increase body weight ?

Build muscle: Muscle weighs more than fat. If u eat at least 2500 kcalories a day and build muscle, you should gain weight. Add protein bars or shakes to help feed your muscles.

Eat healthy foods: high in calories. Eat 6 meals /day. Work on strength training to build large muscle groups. Work out w heavier weights w fewer repetitions. Sleep at least 8 - 9 hrs/night. Hydrate well w water. Foods to help w weight gain: almonds, cashews, pecans, sunflower seeds, flax seeds, walnuts, hummus, avocados, granola, trail mix, dried fruits, protein shakes & bars, lean meats, poultry, fish, smoothies