Eat more calories than you burn every day
Choose calorie-dense foods like nuts, nut butters, avocados, olive oil, cheese, whole milk, and dried fruit
Eat larger portions at meals
Add extra snacks between meals
Drink calories with smoothies, milk, protein shakes, and meal replacement drinks
Eat more frequently throughout the day
Prioritize protein at each meal
Include carbohydrates like rice, pasta, potatoes, oats, and bread
Add healthy fats to meals whenever possible
Strength train regularly to build muscle
Reduce excessive cardio if it is limiting weight gain
Track your food intake to make sure you are in a calorie surplus
Weigh yourself regularly to monitor progress
Sleep enough each night
Manage stress to support appetite and recovery
See a doctor if you are losing weight unexpectedly or cannot gain weight despite eating more