No, wine does not contain caffeine. Grapes are not a caffeine-producing plant, and the fermentation process that turns grape juice into wine doesn’t create caffeine either. If you’ve felt a burst of energy or a racing heart after drinking wine, something else in the glass is responsible.
Why Wine Is Naturally Caffeine-Free
Caffeine is produced by a relatively small number of plants, including coffee, tea, cacao, and guarana. Grapevines aren’t among them. Since wine is made from fermented grape juice, with yeast, sulfites, and sometimes added sugar as the only other typical ingredients, there’s no point in the process where caffeine enters the picture.
One small curiosity: a study published in the journal Antioxidants found that when grape seed extracts were heated under laboratory conditions, measurable amounts of caffeine appeared. This is a quirk of food chemistry research, not something that translates to your glass of wine. The concentrations were tiny, the conditions were artificial, and grape seeds are filtered out during winemaking long before anything like that could matter.
What in Wine Mimics a Caffeine Buzz
If wine sometimes makes you feel wired rather than relaxed, you’re not imagining it. Several compounds in wine can raise your heart rate, cause flushing, or create a jittery feeling that resembles caffeine’s effects.
- Alcohol itself: Ethanol is a central nervous system depressant overall, but in the short term it triggers a release of adrenaline and dopamine. This is why the first glass can feel stimulating before the sedative effects kick in.
- Histamine and other biogenic amines: Red wine in particular contains histamine, tyramine, and other biogenic amines that form during fermentation. These compounds can speed up your heart rate, cause facial flushing, and trigger headaches. People who are sensitive to histamine often mistake these symptoms for a stimulant effect.
- Acetaldehyde: Your body breaks alcohol down into acetaldehyde, a toxic byproduct that causes the classic flush syndrome: red face, warm skin, and a pounding heartbeat. Some people process acetaldehyde slowly, making these reactions more intense.
- Sugar: Sweeter wines can deliver a noticeable blood sugar spike, especially on an empty stomach. That quick energy rush followed by a crash can feel a lot like the caffeine cycle.
Red wine tends to produce more of these pseudo-stimulant effects than white wine because it has higher levels of histamine, tyramine, and tannins. If you consistently feel buzzed in a caffeine-like way after red wine specifically, histamine sensitivity is a likely explanation.
Wine-Based Drinks That Do Contain Caffeine
While plain wine is caffeine-free, some mixed drinks and specialty products combine wine with caffeinated ingredients. A few examples worth knowing about:
Buckfast Tonic Wine, a fortified wine popular in parts of the UK, contains about 60 mg of caffeine per 100 mL. A single 5-ounce glass delivers roughly 89 mg of caffeine, comparable to a cup of coffee. It’s an outlier in the wine world, intentionally caffeinated during production.
Calimocho, a popular Spanish drink made by mixing equal parts red wine and cola, picks up about 8 mg of caffeine per serving from the cola. That’s a small amount, roughly a tenth of a cup of coffee.
Espresso martinis and other cocktail-style canned drinks that use wine as a base sometimes contain significant caffeine. If you’re buying a premixed wine cocktail, check the label. Any product that includes coffee, tea, cola, guarana, or “natural energy” ingredients will have caffeine that the wine itself didn’t contribute.
How Wine Compares to Other Drinks
For context, an 8-ounce cup of brewed coffee contains 80 to 100 mg of caffeine. Black tea has about 47 mg per cup. A 12-ounce cola runs around 34 mg. Plain wine, whether red, white, rosé, or sparkling, contains 0 mg. Even dealcoholized wine remains caffeine-free, since there was never caffeine to remove in the first place.
If you’re avoiding caffeine for medical reasons or trying to wind down before bed, standard wine won’t interfere with that goal on the caffeine front. The alcohol, sugar, and histamine content are separate considerations that can still disrupt your sleep, but caffeine isn’t the culprit.