Thanks for contacting healthcare magic. You want to gain a weigh than do some diet modifications like... Egg cause fast increase a weight.One egg per day helpful.Don t take too much egg because it high in cholesterol... Take Banana in diet. Take protein rich food like peanut butter....etc Whole milk is helpful to you.. Do a regular exercise more than minute 30 minutes. Consent a nutritionist for proper weight gaining diet plan. I hope my guidance helpful to you.. Take care. Thank you.