How can i gain weight? 20 yr old male 130lbs

Calorie dense foods: Eating calorie dense foods such as nuts, heavy cream, butter, fatty fishes, dried prunes, and avocado can help increase your daily calorie intake and assist in the desired weight gain. Add lean proteins to help build muscle mass while adopting an exercise regimen. Supplements for weight gain would be inferior in quality to whole foods which are readily available and much less expensive.