Barley tea is a caffeine-free grain drink that may support digestion, blood sugar control, and heart health

Barley tea (called mugicha in Japan and boricha in Korea) is made by steeping roasted barley grains in hot water. It tastes nutty and slightly sweet without added sugar, and it contains compounds that research suggests may help regulate blood glucose, reduce inflammation, and support cholesterol levels. Unlike green or black tea, it has no caffeine, so you can drink it at any time of day without affecting sleep.

The active compounds in barley—beta-glucan fiber, polyphenols, and antioxidants—are what produce most of the observed effects. These are not new discoveries: barley tea has been a daily drink in East Asia for centuries, and modern studies have begun to confirm what traditional use suggested. The evidence is strongest for blood sugar and digestive effects; the heart health claims are supported but less conclusive.

Key Takeaways

  • Barley tea contains beta-glucan fiber, which may slow glucose absorption and help stabilize blood sugar after meals.
  • The drink is naturally caffeine-free and can be consumed at any time without disrupting sleep patterns.
  • You can buy roasted barley tea ready-made in bags or loose form, or roast raw barley yourself at home for lower cost.
  • Brewing takes 5 to 10 minutes with hot water; cold brewing overnight is also an option for a milder flavor.
  • People taking blood-thinning medications or with barley allergies should check with their doctor before regular use.

How barley tea affects blood sugar and digestion

The primary active ingredient in barley is beta-glucan, a soluble fiber that slows the rate at which carbohydrates enter the bloodstream. When you drink barley tea with or shortly after a meal containing carbohydrates, the beta-glucan may reduce the spike in blood glucose that normally follows. Studies in people with type 2 diabetes and in those without diabetes have shown modest but measurable improvements in post-meal glucose levels.

This same fiber also feeds beneficial bacteria in your gut, which can improve digestion and bowel regularity over time. The roasting process that gives barley tea its flavor also creates compounds called melanoidins, which have mild anti-inflammatory effects in the digestive tract. If you have a sensitive stomach or inflammatory bowel condition, start with small amounts—barley is a grain and can trigger symptoms in some people.

Cholesterol and heart health effects

Regular barley consumption has been linked to modest reductions in LDL cholesterol (the type associated with plaque buildup) and improvements in overall cholesterol ratios. The beta-glucan fiber is the main mechanism: it binds to cholesterol in the digestive tract and helps remove it from the body. The effect is real but modest—studies typically show a 5 to 10 percent reduction in LDL cholesterol with consistent use over several weeks.

Barley tea also contains polyphenols and other antioxidants that may reduce oxidative stress in blood vessels, potentially supporting blood pressure and circulation. However, these effects are not as well-studied as the glucose and cholesterol benefits. If you are taking statins or other cholesterol medications, barley tea is a reasonable addition but not a replacement for your medication.

Choosing and buying barley tea

You have three main options: pre-made tea bags, loose roasted barley, or raw barley to roast yourself. Tea bags are the most convenient and cost about $0.30 to $0.60 per serving; loose roasted barley costs less per serving (roughly $0.10 to $0.20) but requires a strainer or infuser. Raw barley is the cheapest option if you roast it at home, costing pennies per serving, though it requires an oven and 20 to 30 minutes of your time.

Look for barley labeled "roasted" or "roasted barley tea"—raw barley will taste grassy and bitter. Japanese mugicha and Korean boricha are reliable brands widely available online and in Asian grocery stores. Organic options exist but cost more; conventional barley is safe and the roasting process kills most surface contaminants. Store roasted barley in an airtight container away from heat and moisture; it keeps for several months.

How to brew barley tea hot and cold

Hot brewing is the standard method. Use about 1 tablespoon of loose roasted barley (or one tea bag) per 8 ounces of water. Heat water to just below boiling (around 200°F) and steep for 5 to 10 minutes. Longer steeping produces a stronger, more bitter flavor; shorter steeping is milder and slightly sweeter. Strain and drink plain or with a squeeze of lemon. You can reuse the same barley grains once or twice for a second and third cup with slightly weaker flavor.

Cold brewing takes longer but produces a smoother, less astringent tea. Place 2 to 3 tablespoons of roasted barley in a jar, cover with cold water, and refrigerate overnight (8 to 12 hours). Strain in the morning and drink cold or reheat. Cold-brewed barley tea keeps in the refrigerator for up to a week. Many people find the cold version easier to drink in larger quantities because it tastes less intense.

Roasting barley at home

If you buy raw barley (usually sold as "pearl barley" or "hulled barley" in the grain section of grocery stores), you can roast it yourself. Spread a thin layer on a baking sheet and roast at 350°F for 20 to 30 minutes, stirring every 5 to 10 minutes, until the grains turn golden brown and smell nutty. Do not let them turn dark brown or black—that produces a burnt, unpleasant flavor.

Cool the roasted barley completely before storing in an airtight container. Homemade roasted barley costs roughly $0.02 to $0.05 per serving and tastes as good as store-bought versions. The main trade-off is time and attention; if you drink barley tea daily, roasting a batch once a month is practical. If you drink it occasionally, pre-roasted tea bags are worth the extra cost.

Who should avoid or limit barley tea

Barley contains gluten, so people with celiac disease or non-celiac gluten sensitivity should not drink it. Some people with irritable bowel syndrome (IBS) find that the high fiber content causes bloating or gas; if that happens to you, reduce the amount of barley per cup or drink it less frequently. Barley may have mild blood-thinning properties, so if you take warfarin or other anticoagulants, mention barley tea to your doctor before making it a daily habit.

Barley allergies are rare but possible, especially in people with grass pollen allergies. If you have never had barley before, start with a small cup and wait a few hours to see if you experience any reaction. Pregnant and nursing people can drink barley tea safely in normal amounts, though there is no specific research on very high intakes during pregnancy.

Frequently Asked Questions

Does barley tea actually lower blood sugar?

Studies show modest but real effects: barley tea consumed with meals may reduce post-meal blood glucose spikes by 10 to 20 percent in people with and without diabetes. The effect is strongest when you drink it with carbohydrate-containing foods. It is not a replacement for medication or diet changes, but it can be a useful addition to a routine aimed at managing blood sugar.

Can I drink barley tea every day?

Yes, daily consumption is safe for most people and is common in Japan and Korea. If you have gluten sensitivity, a bleeding disorder, or IBS triggered by fiber, check with your doctor first. Otherwise, drinking one to three cups daily is well-tolerated and may produce stronger effects on cholesterol and digestion than occasional use.

Does barley tea have any taste?

Yes—it tastes nutty, slightly toasted, and mildly sweet without added sugar. Many people find it pleasant and drink it like regular tea. If you dislike the flavor, you can add a small amount of honey, lemon, or ginger, or try cold brewing, which tastes smoother and less intense than hot brewing.

Is barley tea the same as barley water?

No. Barley water is made by boiling whole barley grains in water for a long time, producing a thick, starchy liquid often used in traditional medicine. Barley tea is made from roasted barley grains steeped briefly in hot water, producing a clear, light beverage. They are different products with different flavors and textures.

Where do I buy barley tea?

Tea bags and loose roasted barley are available online (Amazon, specialty tea sites), in Asian grocery stores, and increasingly in conventional supermarkets in the tea aisle. Raw barley for roasting yourself is sold in the grain or bulk section of most grocery stores. Prices vary widely; compare cost per serving rather than package price.