Barley
Barley (Hordeum vulgare) is one of the world's oldest cultivated grains and a quietly impressive whole grain for everyday health. Its claim to fame is a soluble fiber called beta-glucan, the same compound that makes oats heart-healthy. The evidence here is unusually solid: barley's beta-glucan reliably lowers LDL ("bad") cholesterol and softens the blood-sugar spike after meals, which is why the U.S. Food and Drug Administration allows barley foods to carry an official heart-health claim. Hearty, chewy, and endlessly adaptable in soups, stews, and grain bowls, barley is a budget-friendly way to add fiber and staying power to a meal. The one important catch: barley contains gluten, so it is not safe for people with celiac disease or a gluten sensitivity.
Table of Contents
- What Barley Is
- Nutritional Profile
- Cholesterol — the Beta-Glucan Story
- Blood Sugar & Glycemic Control
- Gut Health & Fullness
- How to Cook & Eat It
- Considerations
- Research Papers
- Connections
What Barley Is
Barley is an ancient cereal grain that humans have grown and eaten for more than 10,000 years. It still turns up in soups, stews, salads, and risotto-style dishes, and it is a major ingredient in bread, animal feed, and malt for beer and whiskey. As a food, it comes in a few different forms, and the form matters for how nutritious it is.
- Hulled (or hull-less) barley — the least processed form. Only the tough, inedible outer hull is removed, leaving the fiber-rich bran and the nutrient-dense germ intact. This is true whole-grain barley and the most nutritious choice. It is chewy and takes the longest to cook.
- Pearled (or "pearl") barley — the most common type on store shelves. It has been polished to remove the hull and some or all of the bran, so it is technically partly refined rather than a whole grain. It cooks faster and has a softer texture, but it loses some of the fiber and nutrients found in the bran. It is still a nourishing food — just not quite as fiber-rich as hulled barley.
- Barley flakes and barley flour — barley that has been rolled into flakes (like rolled oats) or ground into flour for porridge, baking, and thickening.
A simple rule of thumb: the closer barley is to its whole, unpolished form, the more fiber and nutrition it keeps.
Nutritional Profile
Barley is a fiber powerhouse. A cooked serving delivers a generous amount of dietary fiber, and a notable share of it is beta-glucan — a type of soluble fiber that dissolves into a thick gel in the gut. Beta-glucan is the active ingredient behind most of barley's proven health benefits, and barley is one of the richest natural sources of it.
Beyond fiber, barley provides:
- Several B vitamins, including niacin (B3) and thiamin (B1), which help the body turn food into energy.
- Manganese and selenium — trace minerals that support metabolism and act as part of the body's antioxidant defenses.
- Magnesium and phosphorus, minerals important for bones, muscles, and energy.
- Plant protein — a modest but useful amount, more than you get from white rice.
One important caveat: hulled barley carries more fiber and minerals than pearled barley, because polishing strips away much of the mineral-rich bran. Both are healthy, but if nutrition is your priority, hulled (or hull-less) barley is the better pick.
Cholesterol — the Beta-Glucan Story
This is barley's standout, best-supported benefit. Its beta-glucan soluble fiber lowers LDL ("bad") cholesterol, a key driver of heart disease. The way it works is elegant: in the gut, beta-glucan forms a thick gel that traps bile acids (which your body makes from cholesterol) and carries them out in stool. To replace the lost bile, the liver pulls cholesterol out of the blood — and blood LDL drops as a result.
The evidence is strong enough that the U.S. Food and Drug Administration authorizes an official heart-health claim for barley. The FDA concluded that eating whole-grain and dry-milled barley products supplying at least 3 grams of beta-glucan per day can lower total and LDL cholesterol and help reduce the risk of coronary heart disease. Independent meta-analyses — studies that pool together many randomized trials — back this up, finding a meaningful, consistent drop in LDL cholesterol from barley beta-glucan. For a single food, that is about as good as the evidence gets.
Blood Sugar & Glycemic Control
The same gel-forming beta-glucan that lowers cholesterol also helps steady blood sugar. By thickening the contents of the stomach and small intestine, it slows down how fast a meal is digested and how quickly sugar is absorbed. The result is a gentler, lower rise in blood sugar (and insulin) after eating.
Compared with many other grains, barley has a relatively low glycemic index, meaning it raises blood sugar more slowly. Pooled analyses of randomized trials show that barley and barley beta-glucan blunt the after-meal blood-sugar spike in healthy people. This makes barley a smart grain choice in the context of preventing and managing type 2 diabetes — though it is one helpful food within an overall eating pattern, not a treatment on its own.
Gut Health & Fullness
Barley is good for the gut in two ways. First, its fiber — both the soluble beta-glucan and the insoluble fiber in the bran — adds bulk and supports regular, healthy bowel movements. Second, barley acts as a prebiotic: the fibers your own digestion can't break down travel to the large intestine, where beneficial gut bacteria ferment them. That fermentation produces short-chain fatty acids, compounds linked to a healthier gut lining and lower inflammation.
Barley is also remarkably filling. The thick beta-glucan gel slows stomach emptying and helps trigger the body's natural "I'm full" signals, so a barley-based meal tends to keep hunger at bay longer. That extra staying power can make barley a useful ally for appetite control and weight management.
How to Cook & Eat It
Barley is forgiving and easy to cook — think of it as a chewier, heartier alternative to rice.
- Pick your type. Choose hulled or hull-less barley for the most nutrition; choose pearled barley when you want it on the table faster. Both work in nearly any recipe.
- Rinse, then simmer. Give the grains a quick rinse, then simmer in plenty of water or broth until tender — roughly 25–40 minutes for pearled barley and closer to an hour for hulled. Drain off any extra liquid. (Soaking hulled barley beforehand shortens the cooking time.)
- Use it widely. Stir it into soups and stews (it thickens them beautifully), build hearty grain bowls and cold salads, or use it as a swap for rice alongside any main dish. Cooked and cooled, it adds chew to a lunch salad; warm, it makes a creamy, risotto-style "barlotto."
Because barley has a mild, slightly nutty, satisfying flavor, it pairs especially well with mushrooms, root vegetables, beans, and rich broths.
Considerations
- Barley contains gluten. This is the most important caution. Barley is not safe for people with celiac disease or non-celiac gluten sensitivity, and there is no such thing as gluten-free barley. Be aware that "barley malt," malt extract, malt syrup, and malt flavoring are derived from barley and hide in many everyday products — breakfast cereals, candy, malted drinks, some soups, and beer — so anyone avoiding gluten needs to read labels carefully.
- Add fiber gradually. Barley is very high in fiber. Ramping up too quickly can cause gas and bloating, so introduce it slowly and drink plenty of water — the soluble fiber needs fluid to do its job comfortably.
- It expands a lot. Cooked barley roughly triples in volume, so a little dry grain goes a long way. Measure modestly to avoid ending up with far more than you planned.
Research Papers
- AbuMweis SS, Jew S, Ames NP. β-glucan from barley and its lipid-lowering capacity: a meta-analysis of randomized, controlled trials. European Journal of Clinical Nutrition. 2010;64(12):1472–1480. doi:10.1038/ejcn.2010.150 — Pooling 11 randomized trials, barley beta-glucan significantly lowered total and LDL cholesterol (LDL down about 0.27 mmol/L) versus control.
- Talati R, Baker WL, Pabilonia MS, White CM, Coleman CI. The effects of barley-derived soluble fiber on serum lipids. Annals of Family Medicine. 2009;7(2):157–163. doi:10.1370/afm.917 — A meta-analysis of 8 randomized trials found barley fiber reduced LDL cholesterol by about 10 mg/dL.
- U.S. Food and Drug Administration. Food Labeling: Health Claims; Soluble Dietary Fiber From Certain Foods and Coronary Heart Disease (final rule adding barley). Federal Register. 2006;71(98):29248–29250. federalregister.gov — The FDA authorized a health claim that barley beta-glucan (at least 3 g/day) lowers LDL cholesterol and may reduce heart-disease risk.
- AbuMweis SS, Thandapilly SJ, Storsley J, Ames N. Effect of barley β-glucan on postprandial glycaemic response in the healthy human population: a meta-analysis of randomized controlled trials. Journal of Functional Foods. 2016;27:329–342. doi:10.1016/j.jff.2016.08.057 — Across 17 studies, barley beta-glucan significantly reduced the after-meal rise in blood glucose and lowered the glycemic index of foods.