Eat more calories than you burn each day
Increase portion sizes at meals
Eat 5 to 6 times per day
Choose calorie-dense foods like nuts, nut butter, avocado, cheese, and dried fruit
Add healthy oils, butter, or sauces to meals
Drink high-calorie beverages like milk, smoothies, or protein shakes
Include protein in every meal
Eat more carbohydrates like rice, pasta, potatoes, oats, and bread
Strength train regularly to build muscle
Limit excessive cardio if weight gain is the goal
Track your daily calorie intake
Sleep enough each night
Weigh yourself regularly to monitor progress
See a doctor if you are losing weight without trying or have trouble gaining weight