Hi corlsharonl49,
I'm like you in that respect, but I'm 10 years older (67). I currently weigh 108 lb., and if I skip even one meal, I'm down to 105 lb. just like that.
I've had my ileostomy for a little over a year. I also need to watch my cholesterol and potassium and 'empty' calories due to other issues (clogged arteries and related kidney insufficiency).
Eating as healthy as you can is a good start. Putting on weight needs to be from a variety of nutritious foods that also fuel your muscles and don't just sit there stored as fat in your cells. That's not to say you can't enjoy junk food from time to time, but eating calories just for the sake of calories may be a waste of potential nutrition that your body desperately needs with an ileostomy.
I strongly recommend enlisting a dietitian to tailor a specific eating plan for YOU. This eating plan should take into account your ileostomy AND any other pre-existing conditions you may have. Your doctor (surgeon or general practitioner) should also be involved going forward.
We can't manage our ileostomies with a "one-size-fits-all" approach. Each person needs to exquisitely fine-tune their unique circumstances in order to determine the best approach for themselves when it comes to calorie intake, nutrition intake, fiber intake, etc.
In our cases, corlsharonl49, it appears that our ileostomies tend to flush out more nutrients and calories from our bodies than we are accustomed to, so we simply need to learn more about how that works and how to manage it. Easy peasy, right? LOL
M
xo