Healthy Foods for Weight Gain Dairy * Greek yogurt * Milk Protein * Red meat * Salmon and other oily fish * Whey protein * Whole eggs Grains & Starches * Bran * Brown rice * Ezekiel bread * Oatmeal * Potatoes * Whole wheat bread Fats * Avocados * Healthy oils such as olive and avocado Other * Dried fruits * Nuts * Nut butters Unhealthy Foods for Weight Gain Dairy * Ice cream * Sweetened yogurt Protein * Processed meats such as hot dogs, salami, pepperoni, and bologna Grains & Starches * Foods made with white flour such as white bread, flour tortillas, white bagels, cakes, cookies, donuts, etc. * French fries * Potato chips Fats * Trans fats and polyunsaturated fats, found in many processed baked goods and hydrogenated oils, including canola and corn oil Other * Beer * Candy and candy bars * Sugary drinks such as soda, juice, and sweetened coffee drinks