Yes, I have helped many clients that need to maintain or gain weight while healing. This sensitivity could be due to some dietary sensitivity, yes. Â I would eliminate all grains, sugars, nuts and dairy for a while too. Â I have lots of recipes on this site that will make it easy for you to do that. To maintain weight just eat until full and also eat a bedtime snack (bad for weight loss but good for gaining or maintaining).Â