How to Gain Weight Fast:
If you want to gain weight healthily, skip the sweets. Opt for nutrient-dense foods and beverages, like nuts, dried fruit, high fat dairy products, meat, and shakes.
People who need to gain weight can often do this by increasing their intake of foods rich in whole carbohydrates, healthy fats, and protein. Examples include whole grains, dried fruit, potatoes, avocados, oily fish, eggs, and dairy products.Eating more frequently.