Neuroendocrine tumours
Hospital  >  Care Programs  >  Odette Cancer Program  >  Gastrointestinal cancer care  >  Upper GI care  >  Neuroendocrine tumour (NET) care  >  Patient education  >  Neuroendocrine tumours, carcinoid syndrome & diet

Neuroendocrine tumours, carcinoid syndrome & diet

Download this information as a PDF 

If you have been diagnosed with a neuroendocrine tumour or carcinoid syndrome, you may be experiencing symptoms like:

  • Flushing (redness of the skin)
  • Diarrhea
  • Gas
  • Bloating (feeling overly full and uncomfortable in your stomach area)
  • Abdominal/stomach pain

The following foods and/or eating habits are often triggers and may make these symptoms worse:

  • Large meals
  • High fat meals
  • Alcohol
  • Spicy foods
  • Raw tomatoes
  • Foods containing moderate or high amounts of amines (please see the list on page # 3)

Everyone is unique and you may be able to tolerate nearly all or very few of the trigger foods.

TIP: Keeping a food and symptom diary may be helpful. Record your daily food and drink intake and any symptoms that you experience. You may start to notice a pattern.

What can I eat?

If you are not having any symptoms, follow healthy eating guidelines.

If you have symptoms, you should follow the suggestions below. Remember, you only need to avoid foods that bother you.

General guidelines

  • Eat 4 to 6 small meals daily, instead of 3 large meals
  • Choose a diet high in protein. Include meat and alternatives such as nuts, beans, lentils and legumes at each meal and snack
  • Follow a low fat diet



  • Omega-3 & omega-9 fatty acids:
    • Almonds, olive oil, avocadoes, canola oil, extra virgin olive oil
    • Fatty fish, flax seed meal, walnuts, pumpkin seeds
  • Greasy, fried foods
  • Limit animal fats (butter, cheese, chicken skin)
  • Avoid trans-fats (aka partially hydrogenated oils)
  • Vegetables
    • Eat cooked vegetables to help you digest.
    • Avoid raw tomatoes
  • Avoid foods containing moderate or high amounts of amines. Dietary amines come from protein breakdown in foods. Levels increase in protein foods (meat, fish, cheese) as they age or mature, and in fruits as they ripen (e.g. bananas, tomatoes).

Amine containing foods


Choose Less Often

Choose Often

Aged cheeses
—cheddar, stilton, camembert, etc.

Alcohol—all types

Smoked, salted, cured, aged, fermented, marinated or pickled fish and meats (eg. Smoked salmon, pickled herring, meat extracts, livers, salami, pepperoni, corned beef)

Yeast extracts and “hydrolyzed” proteins: marmite/vegemite; yeasts used for flavouring processed foods; brewer’s yeast; and nutritional yeast

Fermented foods—tofu, miso, sauerkraut, shrimp paste, fish sauce, soy sauce

Broad beans

Spoiled or over ripe foods

—coffee, cola

Dark chocolate, milk chocolate, cocoa powder

Peanuts, brazil nuts, coconut

Avocado, banana, raspberries


Fava beans

Certain vegetarian meat substitutes—check the label for ingredients

Fresh lean meats
, fresh poultry (turkey or chicken), fresh fish

Most vegetables—but cooked may be better for you than raw

Fruit in moderate amounts—but avoid banana, avocado, raspberries

Grain foods, starchy foods—lower fiber or soft cooked grains may be best tolerated

Un-aged cheeses and dairy—low fat cottage cheese, ricotta cheese, mozzarella cheese; low fat yogurt or kefir; low fat cream cheese; low fat milk or low fat lactose-free milk

Fresh soyfoods—soymilk, edamame

Please note that amines do not influence tumour growth.


Carcinoid syndrome can happen from low levels of tryptophan.

Niacin is a vitamin that is made from tryptophan.

Niacin deficiency can happen from:

  • Low levels of tryptophan;
  • Low food intake;
  • Weight loss;
  • Excess serotonin secretion from tumors.

To prevent niacin deficiency, include in your diet:

  • Protein-rich foods at every meal and snack: meat, poultry, fish, eggs, milk, peanut butter, beans, lentils, tofu;
  • Grain products: breads and cereals.

Your doctor may also prescribe a niacin supplement.

Tips to minimize diarrhea

  • Eat smaller, more frequent meals and snacks throughout the day.
  • Drink plenty of non-carbonated (no bubbles or fizz), caffeine free drinks such as water, diluted juice, sports drinks, and clear broth.
  • Limit greasy, fried, spicy, or very sweet foods.
  • Avoid simple sugars such as sweets/desserts, fruit juices and sodas: add water to juice to make less sweet
  • Limit or avoid stimulants such as alcohol and caffeine.
  • Include binding foods: applesauce, bananas, tapioca, barley, oats, white rice, noodles, peanut butter, baked potato without the skin.
  • Avoid foods that are natural laxatives, such as prunes, prune juice, rhubarb, and papaya.
  • Rehydration solutions can be used to keep you hydrated:
    • Gatorade base : 2 cups Gatorade, 2 cups water, and ½ teaspoon salt;Juice base: ½ cup juice, 3 ½ cups water, and ½ teaspoon salt.

Helpful resources

Please contact your registered dietitian with any quesitons.

Odette Cancer Centre patients are welcome to drop by the Nutrition Resource Centre (T wing, Ground Floor) or call 416-480-5000 ext. 3438

Adapted from:
Academy of Nutrition and Dietetics (2014). Carcinoid Syndrome and Diet.
Cancer Care Ontario (2016). How to Manage your Diarrhea.
Carcinoid Cancer Foundation (2008). Nutritional Concerns for the Carcinoid Patient:
Developing Nutrition Guidelines for Persons with Carcinoid Disease.