Yes, beer contains tannins. They come from two main ingredients: barley malt and hops. The levels are lower than in red wine, but they’re high enough to affect beer’s flavor, mouthfeel, and clarity. Conventional beers typically contain 274 to 446 mg/L of total polyphenols (the broader family of compounds that includes tannins), while specialty and craft beers can reach 464 to 1,026 mg/L.
Where Beer Tannins Come From
Roughly two-thirds of beer’s tannins come from the husks of barley kernels, and about one-third come from hops. The exact split depends on the beer’s recipe: a heavily hopped IPA draws more tannins from hops, while a malt-forward amber ale gets most of its tannins from grain.
The tannins from these two sources behave differently. Nearly 96% of the polyphenols extracted from hops are already polymeric tannins, meaning they arrive in beer ready to bind with proteins and create noticeable astringency. Barley’s contribution starts out milder. About 75% of its polyphenols are smaller, simpler molecules that don’t initially have strong tanning properties. Over time, though, oxidation converts those smaller molecules into larger polymers that act much like hop tannins.
Wheat beers are a notable exception. Wheat kernels are essentially husk-free, so beers made with a large proportion of wheat malt tend to be significantly less astringent than their all-barley equivalents. That’s one reason wheat beers often feel softer and smoother on the palate.
How Tannins Affect Flavor and Mouthfeel
Tannins are responsible for the puckering, drying, rough sensation you might notice in certain beers, especially darker ales and heavily hopped styles. This sensation, called astringency, happens when tannin molecules bind to proteins in your saliva, reducing lubrication in your mouth. It’s the same mechanism that makes strong black tea or unripe fruit feel dry on your tongue.
Interestingly, the interaction between tannins and saliva proteins can also reduce bitterness perception. Some of the bitter compounds in beer are also astringent, and when they get “captured” by saliva proteins, fewer of them reach your bitter taste receptors. So tannins don’t just add dryness. They also reshape how you perceive other flavors in the glass.
Tannins and Beer Clarity
If you’ve ever noticed a beer turn hazy after sitting in the fridge, tannins are likely the reason. When beer chills, tannin molecules form weak bonds (hydrogen bonds) with proteins floating in the liquid. These tiny protein-tannin complexes scatter light, creating what brewers call “chill haze.” Warm the beer back up and the bonds break apart, so the haze disappears.
Over time, those weak bonds can become permanent covalent bonds. When that happens, the haze no longer dissolves with warming, and the beer stays cloudy regardless of temperature. This permanent haze doesn’t change the safety of the beer, but it does signal that tannin-protein interactions have progressed irreversibly. Maximum haziness occurs when the number of tannin binding sites roughly equals the number of protein binding sites, forming a large network of particles that scatters the most light.
Why Brewing Technique Matters
The amount of tannin that ends up in finished beer depends heavily on what happens during the brewing process, particularly during sparging, when hot water rinses residual sugars from the grain bed. Two variables control tannin extraction: temperature and pH.
Brewers aim to keep the grain bed below 170°F (77°C) and the pH below 5.8. If either threshold is exceeded, tannins extract at a much higher rate, producing harsh, unpleasant astringency in the finished beer. This is why homebrewers are often told to monitor their grain bed temperature rather than just the temperature of the water going in. It’s also why experienced brewers stop collecting liquid from the grain once the pH climbs above 5.8.
Beyond sparging, choices like boil length, hop variety, and grain bill all influence the final tannin level. A brewer aiming for a crisp, clean lager will take steps to minimize tannins, while someone crafting a bold barleywine may welcome a moderate tannic backbone for structure and complexity.
Can Beer Tannins Cause Headaches?
Some people who are sensitive to tannins in red wine wonder whether beer tannins cause the same problems. Tannins can trigger the release of certain neurotransmitters associated with pain, which is one proposed explanation for red wine headaches. Beer generally contains lower tannin concentrations than red wine, but the mechanism still applies to sensitive individuals.
That said, alcohol itself dilates blood vessels in the brain and is the most common cause of drink-related headaches. Dehydration and drinking on an empty stomach amplify the effect regardless of tannin content. If you suspect tannins specifically bother you, comparing your reaction to a low-tannin wheat beer versus a hop-heavy IPA can be a useful personal experiment.
Beer vs. Wine: Tannin Levels in Perspective
Red wine typically contains 1,000 to 4,000 mg/L of total polyphenols, putting it well above even the most polyphenol-rich craft beers (which top out around 1,000 mg/L). Standard lagers and pale ales sit in the 274 to 446 mg/L range, making them relatively low-tannin beverages overall. White wine falls somewhere between beer and red wine, generally in the 200 to 500 mg/L range depending on skin contact during production.
So while beer does contain tannins, it’s on the lower end of the spectrum compared to other common drinks. You’ll notice them most in dark, malt-heavy ales and aggressively hopped styles, and least in light lagers and wheat beers.