Barley

Barley

Barley (Hordeum vulgare) is one of the first grains domesticated by humans, about 10,000 years ago. In the modern diet it has been pushed aside in favor of wheat and rice and is used mainly to make beer — but nutritionally it is one of the most powerful grains, mainly thanks to one component: beta-glucan.

100 grams of dry pearl barley provide about 352 calories, 73 grams of carbohydrates, 15.6 grams of dietary fiber and 9.9 grams of protein. After cooking, the volume roughly triples, so a cooked serving provides about 120 calories and 6 grams of fiber per cup.

Beta-glucan — the component that carries the load

Beta-glucan is a soluble dietary fiber that forms a viscous solution in the small intestine. Barley contains 3-8% of it — a concentration that rivals oats and sometimes exceeds them.

Viscosity is the mechanism. The gel that forms binds bile acids and prevents their reabsorption at the end of the small intestine; the liver has to produce new bile acids, and to do so it draws cholesterol from the blood — and so LDL levels fall. The same viscosity also slows the passage of food and the action of digestive enzymes on starch, hence the effect on blood sugar.

This is one of a small number of food components to have earned an officially approved health claim: both the US FDA and the European Food Safety Authority (EFSA) have approved stating that beta-glucan from barley helps lower cholesterol. The threshold set by EFSA is 3 grams of beta-glucan a day — an amount reached with about a cup of cooked barley.

Research-based health benefits

• Lowering LDL: meta-analyses of controlled trials show a consistent reduction in total cholesterol and LDL with beta-glucan from barley, without harming HDL.

• The lowest glycemic index among grains: cooked pearl barley has a GI of about 25-30 — dramatically lower than white rice (about 73), white bread (about 75) and even quinoa (about 53). This is an exceptional figure that makes barley one of the most suitable starchy foods for anyone managing blood sugar.

• The “second-meal effect”: an interesting finding documented in trials — a barley-based dinner improves the glycemic response to the next morning’s breakfast. The explanation: the fibers fermented in the large intestine produce short-chain fatty acids that affect insulin sensitivity for many hours afterward.

• Satiety: viscosity slows gastric emptying. Studies show reduced calorie intake at subsequent meals after a barley-based meal.

• Prebiotics and the microbiome: beta-glucan and resistant starch reach the large intestine and serve as food for beneficial bacteria, producing butyrate, which supports the cells of the intestinal wall.

• Minerals: a good source of selenium, manganese, magnesium and phosphorus.

Pearl barley vs. whole barley — a point worth knowing

Usually, when a grain is polished and its bran removed, it loses most of its fiber. Barley is an exception: its beta-glucan is spread throughout the endosperm rather than concentrated only in the outer layer.

What this means: even polished pearl barley retains a substantial share of its beta-glucan and remains rich in fiber — unlike, for example, white rice, which has lost almost everything. Whole barley (hulled/pot barley) is still better — more fiber, more minerals and more B vitamins — but it takes much longer to cook.

Practical conclusion: pearl barley is a perfectly good compromise, not a “refined grain” in the usual sense.

Downsides and health considerations

• Gluten — an absolute restriction: barley contains hordein, a protein in the gluten family. It is completely off-limits for people with celiac disease and gluten sensitivity, and it is not a substitute for buckwheat or quinoa. This is its most significant downside, and also the main reason it is less common on modern menus.

• FODMAPs: barley is rich in fructans and is not suitable for the elimination phase of a low-FODMAP diet. In people with irritable bowel syndrome it may cause bloating and gas.

• Long cooking time: whole barley requires soaking and cooking for about an hour; pearl barley about 25-40 minutes. This is a real practical barrier that explains part of its disappearance from everyday cooking.

• Phytic acid: as with all whole grains, phytate reduces the absorption of iron and zinc. Soaking reduces it to some extent.

• A sudden increase in fiber: a sharp switch to a high fiber intake may cause gas and discomfort. Increase gradually and drink water accordingly — soluble fiber needs fluid to work.

Nutrition facts per 100 grams (pearl barley, dry)

Practical use

How much for beta-glucan: a cup of cooked barley a day provides roughly the 3 grams set as the threshold in EFSA’s health claim.

Cooking: pearl barley — about 1:3 with water, 25-40 minutes. Whole barley — soak overnight, then about an hour. Both types are excellent for cooking in bulk and storing in the refrigerator for several days.

Cooling adds value: as with rice and potatoes, cooling after cooking creates resistant starch — additional fiber that feeds gut bacteria and further lowers the glycemic response.

Combinations: excellent in soups (where its viscosity works in its favor), as a base for a grain salad instead of couscous or rice, and as a rice substitute in stews. A barley “risotto” works well thanks to the starch it releases.

Toasted barley (green barley groats / freekeh): has a distinctly smoky aroma and a similar nutritional profile.

Summary

Barley is one of the most underrated grains. It has two prominent, measurable advantages: beta-glucan at a level that earns an approved health claim for lowering cholesterol, and the lowest glycemic index among common grains. Another practical advantage is that even polished pearl barley retains most of the value. The only significant limitation is gluten — if you are not restricted by it, you get an especially cheap, high-quality grain.