This topic is about someone who is trying to gain weight while dealing with an ileostomy, after having had bariatric surgery, and while undergoing chemotherapy. They face challenges because they can only eat small portions due to the bariatric surgery, and they need to find ways to increase their calorie and protein intake without causing too much discomfort or increasing the need to manage their ostomy pouch more frequently. Here are some suggestions and insights shared:

- Opt for calorie-dense foods like nut butters, avocados, and full-fat dairy products to pack more calories into smaller portions.
- Consider high-calorie and protein supplements such as Boost Very High Calorie, Ensure Plus, Premier Protein, or Orgain to help meet nutritional needs.
- Choose soft protein sources like eggs, Greek yogurt, cottage cheese, fish, and poultry, which are easier to digest.
- Eat small, frequent meals that are lower in gas production, and avoid foods known to cause gas. Products like GasX or Beano and using filtered bags can help manage gas.
- Stay hydrated with electrolyte drinks like Pedialyte, Liquid IV, or DripDrop, and sip fluids throughout the day.
- Liquid vitamins, such as Forvia, and fiber supplements like Metamucil might be beneficial.
- Work with a dietitian who understands both ostomy and bariatric needs, keep a detailed food journal, and be patient with experimenting to find what works best.

Some additional advice and insights include:

- Remember that no single diet works for everyone with an ileostomy. Nutrient absorption varies based on how much of the small bowel remains and whether the ileocecal valve is intact, so dietary advice should be personalized.
- Be cautious with calorie-dense liquids, like sugary Boost shakes, as they can move quickly through the small bowel, increase output, and lead to nutrient loss.
- Monitor your tolerance for high-fat foods, especially if there are concerns about gallbladder or liver function.
- The most universally helpful steps are to consult a registered dietitian who specializes in IBD/ostomy, keep a detailed log of food and drink intake, urine volume, and ostomy output, and be ready for some trial and error, allowing time for changes to take effect.