While most people have weight to lose, there are some who need to gain weight. Being underweight can be just as unhealthy as being overweight. Hence this diet revolves around consuming an additional 500 calories a day, which experts agree is optimum for weight gain.

Most doctors agree that to gain weight in a healthy fashion requires eating calorie dense yet nutritious food. An example of a breakfast while on the weight gain diet includes granola, chopped nuts, a banana, milk and juice. A lunch would involve 1/2 an avocado, a can of tuna in oil, 2 sliced tomatoes, a handful of olives, mixed salad leaves, 2 tsp of olive oil and a tbsp of sesame seeds. You are also allowed multiple snacks and must eat a sensible dinner.

In order to gain weight some might indulge in fattening foods, but this is definitely the wrong route to take if you want to remain healthy. People usually gain about one pound per week when they appropriately follow the weight gain diet.