I want to put on weight

I am very thin and have been trying to put on weight for the past two years without any success. Some friends have suggested that I should use drugs but I don’t like the idea. Kindly advise me on how to put on weight without using drugs.
Maria (by SMS)

Although you didn’t indicate your age and profession, it has been confirmed that with advancing age, an individual can put on extra weight without any special effort. However, if you still want to hasten your weight increase, you will need to increase your intake of carbohydrates as is found in food items such as yams, bread and cereals. You could also add cocoa and chocolate drinks to your food regime.