Hello what is the best way of gaining weight?

Nutrition: Weight gain is generally the result of eating more calories than are expended over time. Although counterintuitive, exercise can help with weight gain, particularly if strength training is done. The increase in skeletal muscle increases body weight more than a similar amount of fat would. Proper, balanced nutrition is likewise important when trying to gain weight.

Healthy weight gain: Can be accomplished by increasing your overall calories by 500 per day. Incorporate avocado, unsalted raw nuts and high quality protein such as fish, eggs and lean meats. This will help you build both muscle and fat.