Can oats cause bloating and gas?
Daniel Moore
Published Jan 16, 2026
Whole grains such as wheat and oats contain fiber, raffinose, and starch. All of these are broken down by bacteria in the large intestine, which leads to gas.
Why do oats cause bloating?
Soluble fiber can cause gas and bloating in some individuals depending on the amount they are consuming. However, one of the biggest issues with oats is that a lot of sources of oats have had cross-contact with gluten-containing grains - even some that are labeled gluten-free.
Can eating oatmeal everyday cause gas?
Oats and whole grains are good sources of fiber, which is essential for heart and digestive health and aids in weight loss. However, sometimes whole grains and steel cut oats cause gas. Fiber is an important nutrient, but it can make you feel bloated; it's as if your stomach is heavy and full of air.
Can eating oatmeal everyday cause bloating?
It can cause bloating.
"Whole grains such as wheat and oats contain high fiber, glucose, and starch," says Shannon Henry, RD for EZCare Clinic. "All of them are consumed by bacteria in the gut or large intestine which leads to gas and bloating in a few people.
Can oats cause digestive problems?
Oats can cause gas and bloating. To minimize side effects, start with a low dose and increase slowly to the desired amount. Your body will get used to oat bran and the side effects will likely go away.
33 related questions foundCan oats cause IBS symptoms?
Raw oats are high in resistant starch, which is difficult for many people with IBS to digest. However cooked oats are low in resistant starch. What are resistant starches? Resistant starches are not digested in the small intestine, but in the large intestine where they can produce gas leading to IBS symptoms.
What are the symptoms of oat intolerance?
Symptoms of an oat allergy in adults, babies, and children include:
- hives.
- a flushed face.
- a red, itchy rash around the tongue, mouth, or eyes, which can spread to other parts of the body.
- mild swelling of the lips, eyes, or face.
- an itchy throat and mouth.
- watery eyes.
- a runny or stuffy nose.
- sneezing.
Why does oatmeal hurt my stomach?
Oats contain a protein called avenin, which can cause an allergic reaction in some people. A person who has eaten oats can sometimes feel unwell and experience the symptoms of an oat allergy. However, it could be that they have a gluten intolerance.
What happens when you eat too much oatmeal?
If you're adding a hefty amount of sugar and butter, eating this in excess may cause you to gain weight. Furthermore, eating too much oatmeal can cause gastrointestinal issues, like bloating. While oatmeal's high fiber content can help relieve constipation, it can also cause some people to experience gas and bloating.
What happens if you eat oats everyday?
They're a gluten-free whole grain and a great source of important vitamins, minerals, fiber, and antioxidants. Studies show that oats and oatmeal have many health benefits. These include weight loss, lower blood sugar levels, and a reduced risk of heart disease.
How do you avoid gas when eating oatmeal?
But to cut down on gas, try substituting certain soluble fiber foods with insoluble fiber foods. For example, oat bran contains mostly soluble fiber, and wheat bran contains more insoluble fiber. So, regular wheat bran cereal or bran muffins may cause less gas than oat bran cereal or oat bran muffins.
Do uncooked oats cause gas?
“Oats when eaten raw provide two potential issues — firstly, it causes bloating and gas, secondly, oatmeal contains phytates.
Is oatmeal good for bloated stomach?
Enjoying a bowl of oatmeal in the morning can be an easy and effective way to battle bloating. That's because oats are loaded with fiber, boasting 4 grams in each 1/2-cup (40-gram) serving ( 32 ). Plus, they contain a specific type of fiber called beta glucan, which has powerful anti-inflammatory properties ( 33 ).
Can you be intolerant to oats?
Sensitivity or allergy to oats is uncommon. People with these conditions have an immune system reaction to avenin, a protein found in oats. People who are sensitive to gluten, such as those with celiac disease, may also react adversely to oats due to cross-contamination of products.
What foods cause instant bloating?
Common bloating triggers include:
- apples.
- beans.
- cruciferous vegetables such as broccoli, cauliflower, and cabbage.
- dairy products.
- lettuce.
- onions.
- peaches and pears.
How many times we can eat oats per day?
The basic concept is to eat oatmeal as your main course for one or two meals each day. There's also the oatmeal diet plan that includes two phases. These are: Phase 1: Eat oatmeal for three meals each day for the first week.
Is oatmeal inflammatory?
“Eating whole grain oats can prevent diabetes and lower cholesterol levels, which could prevent cardiovascular disease.” Some studies show that oats have anti-inflammatory effects, Sang says, “which could prevent inflammation related to chronic disease.” Fiber is oatmeal's main health attribute.
Is eating 2 cups of oatmeal too much?
You should probably not eat more than one cup of oatmeal at a time. More than one cup of oatmeal is considered to be too much oats to eat at one time.
Who should not eat oatmeal?
And while it's a great whole grain offering, oatmeal can be a problem if you have stomach issues, especially individuals with certain gastrointestinal issues like irritable bowel disease. One cup of oats contains a little over 8 grams of fiber.
Can oatmeal worsen IBS?
Certain grains: Gluten-free oatmeal and brown rice are usually well-received by people with IBS and provide soluble fiber, which helps regulate bowel movements. Low-fat yogurt: Some people with IBS have worse symptoms after eating dairy foods.
What can I eat for breakfast if I have IBS?
Eggs. Eggs digest easily and are a safe choice for someone with IBS. Eggs can be enjoyed hard-boiled, soft-boiled, scrambled, or poached. Omelets and frittatas can be your meal of choice for breakfast, lunch or dinner, and make a great option when eating out in a restaurant.
Does oatmeal have gluten?
While oats are naturally gluten free, they may come in contact with gluten-containing grains such as wheat, rye and barley at the farm, in storage or during transportation.
How do you stop oatmeal bloating?
But you may encounter some bloating and gas in the beginning, as your body adjusts to your new diet. This could be why after eating oats gastrointestinal problems occur. The solution to that is to increase fiber gradually over a few weeks, says the Mayo Clinic.
What relieves bloating fast?
The following quick tips may help people to get rid of a bloated belly quickly:
- Go for a walk. ...
- Try yoga poses. ...
- Use peppermint capsules. ...
- Try gas relief capsules. ...
- Try abdominal massage. ...
- Use essential oils. ...
- Take a warm bath, soaking, and relaxing.
How do I get rid of gas and bloating?
Here are additional suggestions to decrease bloating:
- Eat slowly, and consume smaller, more frequent meals.
- Chew your foods well.
- Drink beverages at room temperature.
- Have your dentures checked for a good fit.
- Increase physical activity during the day.
- Sit up straight after eating.
- Take a stroll after eating.