Answers
How does diabetes affect the stomach, liver and pancreas?
Short answer
Diabetes affects the whole digestive system. Fatty liver, and the liver scarring it can cause, is much more common in people with diabetes. Long-standing diabetes can slow the stomach and bowel, causing fullness, vomiting, constipation or loose motions. New diabetes after 50 with weight loss can be an early sign of pancreatic disease.
Liver
More than half of people with type 2 diabetes have fatty liver, and they are more likely to develop scarring and cirrhosis. Everyone with diabetes should have liver tests, and a FIB-4 score or FibroScan to check for scarring. Weight loss, sugar control and some diabetes medicines help the liver.
Stomach and bowel
Good sugar control, small low-fat meals and a review of medicines help. An endoscopy is done first to rule out a blockage.
- Gastroparesis (slow stomach emptying): fullness after a few bites, bloating, nausea, vomiting of old food, and sugar levels that swing unpredictably
- Constipation, or loose motions that may come at night
- Loose motions from some diabetes medicines, especially when they are started
Pancreas
People with diabetes have a higher risk of pancreatitis and pancreatic cancer. Diabetes that starts after 50, especially with weight loss and no family history, should be checked. Diabetes can also be caused by pancreas disease, such as chronic pancreatitis, which needs different treatment.
When to see a gastroenterologist
- Raised liver enzymes or fatty liver with diabetes
- Repeated vomiting, early fullness or weight loss
- Loose motions or constipation that do not settle
- New diabetes with weight loss, belly pain or oily stools
Gut-friendly eating with diabetes
Eat more
- Vegetables at every meal, with dal or another protein, and a smaller portion of roti or rice
- Whole grains and millets in place of maida
- Small, frequent, lower-fat meals if you have slow stomach emptying
Cut down
- Sugary drinks, sweets and fruit juices
- Large, heavy meals and late dinners
- Alcohol, which affects sugar, liver and pancreas
Good to know
- With gastroparesis, soft or blended food and less raw fibre are easier to digest.
- Vitamin B12 can fall with long-term use of some diabetes medicines; ask about testing.
Common questions
Should everyone with diabetes check their liver?
Yes. Liver tests and a simple FIB-4 score, followed by a FibroScan if needed, are recommended for people with type 2 diabetes.
Why do my sugars swing after meals?
Slow stomach emptying can delay the rise in sugar after food, making doses hard to match. Tell your doctor if this happens with fullness or vomiting.
Can diabetes medicines cause loose motions?
Yes, some can, especially at the start. Do not stop them on your own; your doctor can change the dose or type.