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Health benefits of oat bran

9 health and nutrition benefits of oat bran

Oat bran, derived from the outer layer of the oat kernel, is packed with more protein and fiber than traditional oats. Explore 9 health and nutritional advantages of incorporating oat bran into your diet.

Health Benefits
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9 health and nutrition benefits of oat bran
Last updated on January 11, 2024, and last reviewed by an expert on August 17, 2023.

Oat bran is derived from the outer layer of the de-hulled oat kernel and boasts a rich profile of fiber, vitamins, minerals, and antioxidants, offering numerous health benefits.

9 health and nutrition benefits of oat bran

Oats are often hailed as one of the most nutritious grains available, laden with essential vitamins, minerals, and fiber.

The oat grain, known scientifically as Avena sativa, undergoes a process to remove its non-edible outer covering. The remaining part is the oat groat, which can be further refined to produce oatmeal.

Oat bran represents the outer part of the oat groat, located just below the non-edible cover. While both oat groats and steel-cut oats inherently have bran, oat bran can also be found separately in its pure form.

Oat bran has been associated with various health advantages, including enhanced blood sugar regulation, promoting bowel health, and aiding in reducing blood pressure and cholesterol levels.

Below, discover 9 significant health and nutritional perks of oat bran.

1. Oat bran is packed with nutrients

Oat bran has a well-balanced nutritional composition.

While it has similar amounts of carbs and fat as regular oatmeal, oat bran boasts more protein and fiber — and fewer calories. It is exceptionally high in beta-glucan, a powerful type of soluble fiber.

One cup (219 grams) of cooked oat bran contains:

In addition, oat bran provides small amounts of folate, vitamin B6, niacin, and calcium.

Its high nutrient and low-calorie content make it very nutrient dense.

Oat bran is naturally gluten-free but can be contaminated with gluten during growing or processing. If you avoid gluten, look for oat bran specifically labeled gluten-free.

Summary: Oat bran packs more protein and fiber than rolled or quick oats. It’s also high in many vital vitamins and minerals.

2. Oat bran is high in antioxidants

Oat bran is an excellent source of polyphenols, which are plant-based molecules that act as antioxidants.

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Antioxidants protect your body from potentially harmful molecules known as free radicals. In high amounts, free radicals can cause cell damage linked to chronic diseases.

Oat bran is incredibly high in antioxidants compared to other parts of the oat grain, and it is an excellent source of phytic acid, ferulic acid, and powerful avenanthramides.

Avenanthramides are a family of antioxidants unique to oats. They have been linked to reduced inflammation, anti-cancer properties, and lower blood pressure levels.

Summary: Oat bran is high in multiple antioxidants that may help combat chronic diseases and offer health benefits.

3. Oat bran may reduce heart disease risk factors

Heart disease is responsible for approximately one in three deaths worldwide.

Diet plays a key role in heart health. Certain foods can influence your body weight, blood pressure, cholesterol, blood sugar, and other risk factors for heart disease.

Oat bran may help reduce certain risk factors, such as high cholesterol and blood pressure.

For starters, it’s a great source of beta-glucan, a type of soluble fiber that dissolves in water to form a viscous, gel-like substance in your digestive tract.

Beta-glucans may reduce the amount of cholesterol in your blood because they help remove cholesterol-rich bile — a substance that aids fat digestion.

In a review of 28 studies, consuming 3 grams or more of oatbeta-glucan reduced LDL (bad) and total cholesterol by 0.25 mmol/L and 0.3 mmol/L, respectively.

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Other studies note that beta-glucans can significantly reduce systolic and diastolic blood pressure — the top and bottom numbers in a reading, respectively. This is true for healthy adults and those with pre-existing high blood pressure.

Oat bran also contains avenanthramides, a group of antioxidants unique to oats. One study found that avenanthramides work together with vitamin C to prevent LDL oxidation.

Oxidized LDL (bad) cholesterol is harmful because it’s linked to a higher risk of heart disease.

Summary: Oat bran is high in beta-glucans, a type of soluble fiber that may help reduce cholesterol and blood pressure — two key risk factors for heart disease.

4. Oat bran may help control blood sugar levels

Type 2 diabetes is a health issue that affects over 400 million people.

People with this disease may struggle to control their blood sugar levels. Poor blood sugar control can lead to blindness, heart attacks, strokes, and other health issues.

Foods high in soluble fiber — such as oat bran — may help control blood sugar levels.

Soluble fiber like beta-glucan helps slow the digestion and absorption of carbs through your digestive tract, stabilizing blood sugar levels.

A review of 10 studies in people with type 2 diabetes found that consuming 6 grams of beta-glucan daily for 4 weeks significantly reduced blood sugar levels. Moreover, 3 grams or more of beta-glucan for 12 weeks reduced blood sugar levels by 46%.

Other studies suggest that eating oat bran before or alongside a carb-rich meal can slow down the rate at which sugars enter your bloodstream, possibly stopping blood sugar spikes.

Summary: Oat bran’s soluble fiber may prevent blood sugar spikes and control blood sugar levels — especially in people with type 2 diabetes.

5. Oat bran may support healthy bowels

Constipation is a common issue that affects up to 20% of people worldwide.

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Oat bran is high in dietary fiber, which helps support healthy bowel function.

In fact, just 1 cup (94 grams) of raw oat bran contains an impressive 14.5 grams of fiber. That’s approximately 1.5 times more fiber than quick or rolled oats.

Oat bran provides both soluble fiber and insoluble fiber.

Soluble fiber forms a gel-like substance in your gut, which helps soften stool. Insoluble fiber passes through your gut intact but can make stool bulkier and easier to pass.

Research shows that oat bran can help support healthy bowels.

One study in older adults revealed that eating oat-bran biscuits twice daily for 12 weeks reduced pain and improved the frequency and consistency of bowel movements.

Another 12-week study found that 59% of people who consumed 7–8 grams of oat bran daily could stop taking laxatives — as oat bran was just as effective at relieving constipation.

Summary: Oat bran is high in soluble and insoluble fiber, which may help relieve constipation and support bowel health.

6. Oat bran may provide relief for inflammatory bowel disease

The two main inflammatory bowel disease (IBD) types are ulcerative colitis and Crohn’s disease. Both are characterized by chronic bowel inflammation.

Oat bran may help provide relief for people with IBD.

That’s because oat bran is high in dietary fiber, which your healthy gut bacteria can break down into short-chain fatty acids (SCFAs), such as butyrate. SCFAs help nourish colon cells and may reduce bowel inflammation.

One 12-week study in people with ulcerative colitis found that eating 60 grams of oat bran daily — providing 20 grams of fiber — reduced stomach pain and reflux symptoms. Additionally, it significantly raised colon levels of SCFAs like butyrate.

A review of adults with IBD determined that regularly eating oats or oat bran may help relieve common symptoms, such as constipation and pain.

That said, there are still too few human studies on oat bran and IBD. More research is needed.

Summary: Oat bran may help relieve IBD symptoms by nourishing colon cells and helping reduce inflammation. However, more human studies are needed.

7. Oat bran may lower your risk of colorectal cancer

Colorectal cancer is the third most common type of cancer in the United States.

Oat bran has several properties that may lower your risk of this cancer.

For one, it’s high in soluble fibers — like beta-glucan — that act as food for healthy gut bacteria. These bacteria ferment fiber, which produces SCFAs.

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Test-tube and animal studies note that SCFAs may protect against bowel cancer by suppressing the growth of cancerous cells and inducing cancer cell death.

In addition, oat bran is an excellent source of antioxidants, which may suppress cancer growth.

Test-tube and animal studies suggest that oat bran antioxidants — such as avenanthramide — may either suppress growth or kill colorectal cancer cells.

Oat bran is considered a whole grain — functionally, if not technically — because it’s high in fiber. Population studies link diets rich in whole grains to a lower risk of colorectal cancer.

However, more human research in this area is needed.

Summary: Animal and test-tube studies indicate that several oat bran compounds may protect against colorectal cancer, but more human studies are needed.

8. Oat bran could support weight loss

Oat bran boasts a rich content of soluble fiber, which might play a role in curbing your hunger.

Initially, soluble fiber can potentially increase the presence of hormones responsible for feelings of satiety, such as cholecystokinin (CKK), GLP-1, and peptide YY (PYY).

Additionally, it might decrease the levels of the hunger-inducing hormone, ghrelin.

Consuming foods that maintain a feeling of fullness could support weight reduction by minimizing your overall calorie consumption.

For example, a research study observed that individuals who consumed oat bran for their morning meal felt more satiated and took in fewer calories during their subsequent meal than those who chose a corn-based cereal.

Summary: Oat bran, rich in soluble fiber, can potentially diminish hunger-inducing hormones and elevate those promoting fullness, which might contribute to weight loss.

9. Oat bran is easy to add to your diet

It’s easy to add oat bran to your daily routine.

Hot oat-bran cereal is one enjoyable application. You’ll need:

First, add the water or milk to a pot — along with the salt — and bring it to a boil. Add the oat bran and reduce the heat to a simmer, cooking for 3–5 minutes while stirring constantly.

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Remove the cooked oat bran, add honey and cinnamon, and stir.

You can also mix oat bran into bread dough and muffin batter. Alternatively, add raw oat bran to foods like cereals, yogurts, and smoothies.

Summary: Oat bran is delicious, versatile, and easy to add to your diet. Try it in baked goods, as a hot cereal, or sprinkled atop various snack or breakfast foods.


The outer layer of the oat groat, known as oat bran, is brimming with health advantages.

Rich in fiber, vitamins, minerals, and antioxidants, it can support heart health, regulate blood sugar, promote bowel regularity, and assist in weight management.

What’s more, incorporating oat bran into your meals is a breeze. You can enjoy it as a standalone cereal, mix it into baked treats, or sprinkle it over your preferred snack.

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