Introduction: Can oatmeal cause diarrhea? Oatmeal is a putting together of oats peeled, panicked, or a rough or wiry flour of hulled oats grains that have been milled or steel cut. This ground oat is also called white oats. The other name for steel-cut oats is coarse oatmeal, Irish oatmeal, or pinhead oats.
It is often thought that oats are cooked as thick and large, but now they can be cut and cooked quickly. More the size of grains or oats, it will take more time to cook properly. In the same case, the taste of cooked oats depends on time and ingredients.

The oats’ grains are mixed and peeled by impact, heating, stabilizing, and cooling. All this process will quickly soften the inside seed of the groats. To get the best flavor, the cook adds some sugar to it. Rolled oats are eaten uncooked quickly. Sometimes, it is made with milk or water to get a better flavor.
Some people eat it in raw form but also eat it on toast with milk and sugar. Oatmeal is presented with nuts and raisins, and in granola bars, it increases its taste and becomes healthy for consumers.
That’s why the consumer prefers such oatmeal as they feel more satisfied. Oats meal is essential in oatmeal cookies, oatcakes, and British flapjack bars. It is also used in baked oatmeal dessert dishes such as Apple Brown Betty. Oats are also used for topping many on the table.
In many Arabic and Egyptian soaps, it is used as a thickening agent. This food is famous worldwide because it is cheap and contains protein, carbohydrates, and vitamins. So, let’s know whether this healthy food causes diarrhea.
Nutrients in oatmeal.
Oatmeal is being used all over the world due to full of nutritious proteins and carbohydrates. All these increase its demand. Following is its nutrition list. Remember, the nutrition rate is per 100 gm.
- Water=80 %
- Energy=297 kJ (71 kcal)
- Carbohydrates=12 g
- Sugars= 0.3
- Dietary fiber=1.7 g
- Fat=1.5 g
- Protein= 2.5 g
Effects of oatmeal on health
It was examined in 1997 that using oatmeal in food decreases the risk of heart disease and other diseases. but the human body needs two types of fibers
soluble and insoluble fiber.
Soluble fiber
Soluble fibers can easily dissolve in water and other intestinal fluid. After disbanding, it turns its shape into a gel-like substance further digested by the gut bacteria. This substance helps to absorb water and make a firm-up stool. It has different effects on the human body. It enables the human body to absorb cholesterol and prevents the human heart from dangerous diseases.
Patients with high cholesterol levels are easily controlled by adding oatmeal to their daily or weekly food. Soluble fiber will help you maintain glucose levels in the human body. Many minerals and valuable nutrients are also absorbed into the body through it.
Insoluble Fiber
Unlike soluble fiber, these fibers can not dissolve into the stomach and gastrointestinal tract. Water and other fluid can not dissolve it. In another way, it remains unchanged through the digestion process and gives no source of calories and nutrients.
Diarrhea
The quick and immediate feel queasy and uncomfortable in the abdomen is called diarrhea. It is known as the fastest movement of the fesses in the gut. It leads to watery, very soft, and loose stool. In this situation, one becomes helpless and feels weak. It produces a rumbling voice in the stomach and can cause defecating more than two or three times a day.
Can oatmeal cause diarrhea?
Although oatmeal consists of protein fibers and nutrients, and we consider it positive, oatmeal can cause diarrhea because it contains more insoluble fiber. This insoluble fiber can also cause bacterial infection, allergy, and food intolerance.
These insoluble fibers attract more water, and when excess water can not absorb from the feces, this will lead to loose and watery poop. Some people can not find any symptoms of diarrhea after eating oatmeal, but they can feel allergic due to gluten, a protein found in wheat.
Gas and abdominal comfort
Oatmeal in humans can cause digestive issues like gas and abdominal comfort. Due to high carbohydrates, people use oatmeal to lose weight but sometimes consume more than they require, so this causes problems in the body. So it is suggested by doctors that great care while taking a dose of oatmeal on the table.
Takes time to digest
Oatmeal takes more time to digest and will take two or three hours. Overeating oats can cause bloating and muscle mass shedding and increase sugar intake. Oatmeal can be healthy because, on your empty stomach, it provides a coating wall.
All the grains, like wheat and oats, contain starch and raffinose. All these are broken by bacteria in the large intestine and cause gas in the stomach. Rice is the only food that can never cause stomach gas in grains.
Oatmeal is not the only cause of diarrhea. It can be caused by viral infections or eating uncooked meat or vegetables. If dehydration can be severe and sometimes fatal, always drink more liquid during diarrhea.
Food poisoning is a serious issue and can contain one hour to many weeks. Oats are known as universal food, you can eat them with any food, but the best time for its eating is morning and evening. By eating on a proper timetable, you can surprisingly lose weight.
Come out from diarrhea.
You can solve it by drinking more water during and after the meal. It will help in the digestion of food. Oats are low-risk and more beneficial food, but in some people, they can cause bloating gas and abdominal cramps. Doctors suggest that one cup of pure cooked and full of nutritions is very healthy for you.
Using oatmeal for one month will result in losing weight and unnecessary fats from your body. Diarrhea never occurs due to eating oatmeal. Instead, it will happen due to allergies, emotional disturbance, use of alcohol, and diseases. If you suffer from diarrhea, try BRAT foods like bananas, apples, rice, and toast. These foods help firm the stool.
Questions and Answers
Can oatmeal cause diarrhea in some people?

Yes, oatmeal can cause diarrhea in some individuals, particularly if they are sensitive to the fiber content in oats. Oatmeal is high in soluble fiber, which absorbs water and can speed up digestion, potentially leading to loose stools in sensitive people. Additionally, some individuals may have difficulty digesting the carbohydrates in oats or may be intolerant to gluten contamination in non-certified gluten-free oatmeal.
Is oatmeal safe for people with IBS (Irritable Bowel Syndrome)?
Oatmeal can be safe for people with IBS, but it depends on the individual. The soluble fiber in oats can help regulate digestion for some, but for others, it may trigger symptoms like bloating or diarrhea, especially if consumed in large amounts. Starting with small portions and monitoring the body’s reaction is recommended. Certified gluten-free oatmeal is preferable for those with IBS, as gluten contamination might worsen symptoms.
Can oatmeal worsen diarrhea during an illness?
Oatmeal is generally considered a bland and easily digestible food, which can help during bouts of diarrhea. However, in some cases, the fiber content might worsen diarrhea, especially if consumed in large quantities. Cooking oatmeal until it’s very soft and avoiding adding high-sugar toppings like honey or dried fruits can make it gentler on the digestive system. It’s best to consult a healthcare provider for personalized advice during an illness.
Why does oatmeal make some people gassy or bloated?
Oatmeal contains soluble fiber, which ferments in the gut and produces gas as a byproduct. This can cause bloating or discomfort in people unaccustomed to high-fiber foods or those with a sensitive digestive system. Gradually increasing fiber intake and drinking plenty of water can help minimize these side effects. Adding probiotics to the diet may also aid in reducing gas and promoting a balanced gut microbiome.
Is oatmeal suitable for individuals with gluten intolerance?
Certified gluten-free oatmeal is generally suitable for individuals with gluten intolerance. However, standard oatmeal can be cross-contaminated with gluten during processing. People with celiac disease or severe gluten sensitivity should ensure they consume oatmeal labeled as gluten-free to avoid adverse reactions. Some may still experience symptoms due to avenin, a protein in oats that mimics gluten for a small percentage of sensitive individuals.
Can oatmeal trigger allergies in certain people?
Yes, oatmeal can trigger allergies in certain individuals. Although rare, oat allergies can cause symptoms such as itching, hives, stomach upset, or even anaphylaxis in severe cases. These reactions may be due to avenin, a protein found in oats, or due to cross-contamination with wheat, barley, or rye. Anyone suspecting an oat allergy should consult an allergist for testing and guidance on managing their diet safely.
How does oatmeal’s fiber content affect digestion?
Oatmeal is rich in soluble fiber, which absorbs water and forms a gel-like substance in the gut. This can help slow digestion, stabilize blood sugar levels, and improve stool consistency. However, in large quantities or for individuals not used to high-fiber foods, it can lead to increased bowel movements or diarrhea. Drinking enough water and starting with small portions of oatmeal can help the body adjust to its fiber content.
Should oatmeal be avoided by people with diarrhea?
Oatmeal doesn’t need to be avoided entirely, but its preparation matters for people with diarrhea. Cooking it thoroughly to a soft consistency and avoiding additives like sugar or dairy can make it easier to digest. The soluble fiber in oatmeal can help absorb excess water in the intestines, which might alleviate diarrhea. However, each individual is different, and those experiencing worsened symptoms should consult a healthcare provider.
What are the nutritional benefits of oatmeal?
Oatmeal is a nutrient-dense food rich in fiber, vitamins, and minerals. It contains beta-glucan, a type of soluble fiber that promotes heart health by reducing cholesterol levels. Oats also provide essential nutrients like manganese, magnesium, phosphorus, and antioxidants. Its slow-digesting carbohydrates offer sustained energy, making it a healthy option for breakfast or snacks. These benefits make oatmeal a staple in many balanced diets.
Can consuming oatmeal every day have negative effects?
Eating oatmeal daily is generally healthy, but excessive intake can cause digestive issues for some people. The high fiber content might lead to bloating, gas, or diarrhea if the body isn’t accustomed to it. Overconsumption may also cause calorie imbalance if topped with excessive sugars or fats. Moderation and balance are key, and pairing oatmeal with a variety of other foods ensures a well-rounded diet.
Bibliographic sources
- Gut Advisor. (n.d.). Can Oatmeal Cause Diarrhea? Yes, and More. Retrieved from [https://gutadvisor.com/can-oatmeal-cause-diarrhea/]
- Eat This, Not That! (2021, April 18). The #1 Reason Why You Shouldn’t Eat Oatmeal, Says a Dietitian. Retrieved from [https://www.eatthis.com/reason-shouldnt-eat-oatmeal/]
- Wholeistic Living. (2023, August 6). 7 Reasons Oatmeal and Oat Milk Can Cause Diarrhea. Retrieved from [https://wholeisticliving.com/2023/08/06/oatmeal-oat-milk-diarrhea/]
- Simply Called Food. (n.d.). Does Oatmeal Make You Poop and Cause Diarrhea? (Explained!). Retrieved from [https://simplycalledfood.com/does-oatmeal-make-you-poop-and-cause-diarrhea/]
- HealthCare Consultants USA. (n.d.). Does Oatmeal Give You Diarrhea. Retrieved from [https://healthcareconsultantsusa.com/does-eating-oatmeal-cause-diarrhea.html]
- LIVESTRONG.COM. (n.d.). Is Oatmeal Good for Digestion?. Retrieved from [https://www.livestrong.com/article/440826-is-oatmeal-good-for-digestion/]
- HealthNord. (n.d.). Does Oatmeal Make You Poop and Cause Diarrhea? Let’s Discuss. Retrieved from [https://www.healthnord.com/en-us/nutritions/does-oatmeal-make-you-poop-and-cause-diarrhea/]
- Wellwisp. (n.d.). Why Is Oatmeal Bad For Your Gut? | Gut Health Explained. Retrieved from [https://wellwisp.com/why-is-oatmeal-bad-for-your-gut/]
- Wellwisp. (n.d.). Will Oatmeal Give You Diarrhea? | Nutritional Insights. Retrieved from [https://wellwisp.com/will-oatmeal-give-you-diarrhea/]
- LIVESTRONG.COM. (n.d.). Does Oatmeal Irritate Your Stomach?. Retrieved from [https://www.livestrong.com/article/511071-does-oatmeal-irritate-your-stomach/]
Also read: Oatmeal Benefits; Oatmeal and uric acid: Is it good or bad?; Is it bad to eat too much oatmeal?.
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