Hello there...... Only calories won’t add to your body weight,include the right amount of proteins to your diet. Remember if you want to put on weight and look fit, you need to build muscles not flab. Eat - Eggs, lean meat, fish, pulses, sprouts, and dairy products that rich sources of proteins. Fish such as tuna and mackerel are rich in oil and are one of the best ways to increase weight.....

Hello there. I can understand your concern. What's your height? Weight is to be decided on the height factor and not age. You need to have a frequent and high caloric diet. Consult a dietician in person for a detailed diet chart. Best regards. Dr. Anil Kumar Jain. Bangalore.