hi! greetings from health care magic
It will help to correct your anemia condition. no weight gain. weight gain occur when you are taking high caloric diet like fatty foods, fried and junk foods but at thge same time not doing any physical activity regularly. So you will gain weight as because the calories you are taking are not expensing so it will deposit as extra fat for future utilisation. so look after your diet . avoid all junk foods fast foods, oily fried foods . take more fruits and vegetables . avoid as much as possible non veg foods. do physical activities like morning walk jogging regularly you will never be over weight . Thank you for visiting health care magic

Hello lucky
welcome to healthcare magic
consume plenty of Good balanced healthy food s high in calorie & proteins & regular right kind of exercise.as it is much better,harmless & cheaper than any medicine. So concentrate more on diet than on medicine. Underweight occur due to eating disorders/habits or chronic diseases.Disclaimer
wish you early weight gain

u can include 1 tsp garden seeds soaked in milk every night
include tofu /soya product in diet
include vit c rich foods in diet ....lemon/watermelon/orange/ muskmelon
organ meat beneficial if non veg
meat +fish+poultry helps a lot