Barley is one of the most versatile grains in the world, used for everything from brewing beer to thickening soups to feeding livestock. Global production hits roughly 155 million metric tons annually, with the European Union, Russia, and Australia leading output. While many people encounter barley as an ingredient in soup or bread, its largest single use is actually in animal feed, followed closely by brewing and distilling.
Beer, Whiskey, and the Malting Process
The brewing industry is barley’s most well-known industrial customer. Barley is the preferred grain for beer production because of how efficiently it converts starches into fermentable sugars through a process called malting. During malting, barley kernels are soaked in water for two to three days until they begin to sprout. That sprouting activates enzymes inside the grain that will later break down starches into sugars during brewing.
Once the grain reaches the right moisture level, it’s spread out and turned regularly over four to five days to ensure even germination. The sprouted grain, called green malt, is then dried in a kiln to stop germination. How long it’s kilned determines the flavor and color of the final malt: a light kilning produces pale malts for lagers, while longer, hotter kilning creates the dark malts used in stouts and porters. Beyond beer, malted barley is the base grain for Scotch whisky, Irish whiskey, and many other distilled spirits.
Cooking With Barley
In the kitchen, barley shows up in soups, stews, grain bowls, salads, and pilafs. The two forms you’ll find in most grocery stores are hulled barley and pearl barley, and the difference matters for both nutrition and cooking time.
Hulled barley is the whole grain form. Only the tough, inedible outer husk has been removed, leaving the bran layer intact. It’s chewier, nuttier, and takes longer to cook, often 40 to 50 minutes or more. Pearl barley has been polished to remove some or all of the outer bran along with the hull. Lightly pearled barley looks tan; heavily pearled barley is nearly white. It cooks faster and has a softer texture, which is why it’s the default choice for beef barley soup.
Pearl barley is technically a refined grain, but it holds up better nutritionally than most refined grains. That’s because barley’s fiber is distributed throughout the entire kernel, not concentrated in the outer bran layer the way it is in wheat. So even after polishing, pearl barley retains a meaningful amount of fiber.
Nutritional Profile
A cup of cooked pearl barley provides about 9 grams of dietary fiber and 3.5 grams of protein. It also delivers 145 mg of potassium, 85 mg of phosphorus, 35 mg of magnesium, 2 mg of iron, and small amounts of calcium and zinc. The fiber content is notably high for a cooked grain, driven largely by a soluble fiber called beta-glucan, the same type found in oats.
One thing worth knowing: how barley is processed dramatically affects its impact on blood sugar. Intact or minimally processed barley kernels release glucose slowly. But when barley is rolled into thin flakes, steamed, or otherwise broken down, it can produce blood sugar and insulin responses comparable to white bread. The more the grain’s physical structure is disrupted, the faster your body digests the starches inside it. If blood sugar management matters to you, whole kernels or thick-cut barley are better choices than highly processed barley products.
Heart Health and Cholesterol
Barley’s beta-glucan fiber has a specific, well-documented effect on cholesterol. It forms a gel in your digestive tract that binds to bile acids (which your body makes from cholesterol) and carries them out. Your liver then pulls more cholesterol from your blood to make replacement bile acids, which lowers your overall levels.
The FDA allows foods containing barley beta-glucan to carry a health claim linking soluble fiber to reduced risk of coronary heart disease. The threshold is 3 grams or more of beta-glucan per day from whole oats, barley, or a combination of both. A single cup of cooked pearl barley gets you a significant portion of the way there, and hulled barley gets you even closer since more of the bran is intact.
Animal Feed
By volume, animal feed is barley’s largest use worldwide. It’s a staple feed grain for cattle, pigs, and poultry, valued for its energy content and digestibility. In cooler climates where corn doesn’t grow as reliably, barley often fills the same role in livestock diets. Feed barley doesn’t need to meet the strict quality standards required for malting, so lower-grade harvests are typically channeled into the feed market.
Other Uses
Barley flour is used in flatbreads and as a partial substitute for wheat flour in baked goods, though it produces denser results because it’s lower in gluten. Barley water, made by simmering the grain and straining the liquid, is a traditional drink in parts of Asia and Europe, sometimes flavored with lemon or sweetener.
Barley straw has a niche but practical use in pond and lake management. When barley straw decomposes in water, it releases compounds that appear to inhibit algae growth. The exact mechanism isn’t fully understood, but the effect is well enough established that it’s recommended by agricultural extension services as a low-cost, chemical-free way to keep algae in check in small ponds. The straw doesn’t kill existing algae but helps prevent new growth when applied before algae season begins.
Barley grass, the young green shoots harvested before the grain develops, is sold as a powdered supplement or juice. It’s marketed for its concentration of vitamins and antioxidants, though the amounts you’d get from a typical serving are modest compared to eating a plate of vegetables.