###Human: How can I gain weight? ###Assistant: Hi. Well, your BMI is less than the normal and you are surely slimmer. First of all, I would like to tell you that there is no need to take stress on this issue. You are beautiful the way you are. I will help you improve. Follow this advice. 1. Eat five times a day, small but frequent meals. 2. Drink milk two times a day. 3. Increase the intake of bananas. 4. Exercise, at least for 15 minutes a day. 5. Megace (Megestrol Acetate) oral suspension, 800 mg/day (20 mL/day) will increase your appetite. Take 10 ml in the morning, 10 in the evening. Keep an eye on your bowel habits as well, stay happy.