Wine contains more potassium than any other alcoholic beverage, but it’s not particularly high compared to common foods. A standard 5-ounce glass of red wine has about 187 mg of potassium, which covers roughly 5–7% of what most adults need in a day. That puts it well below potassium-rich foods like bananas (about 420 mg) or a medium baked potato (over 900 mg).
Red Wine vs. White Wine
Red wine delivers noticeably more potassium than white. USDA data lists white wine at about 21 mg per fluid ounce, which works out to roughly 105 mg in a 5-ounce glass. Red wine comes in at 187 mg for the same serving size. The difference traces back to how each wine is made: red wines spend more time in contact with grape skins during fermentation, and the skins are where much of the potassium is concentrated.
Grapes themselves are naturally potassium-rich. The raw juice (called must) contains anywhere from 600 to over 2,500 mg of potassium per liter, depending on the grape variety, the soil, and how the vines were grown. During fermentation, some of that potassium binds with tartaric acid and gradually falls out of the liquid as crystals (those harmless sediment flecks you sometimes find at the bottom of a bottle). The potassium that remains dissolved is what ends up in your glass.
How Wine Compares to Other Drinks
Among alcoholic beverages, wine sits at the top for potassium content. Beer and spirits deliver considerably less per serving. But compared to everyday non-alcoholic drinks, wine is moderate at best. A cup of orange juice has roughly 500 mg of potassium. A cup of coconut water delivers around 600 mg. Even a cup of milk provides about 350 mg. So while wine is the highest-potassium option on a bar menu, it isn’t a meaningful potassium source in the context of your whole diet.
What This Means for Your Daily Intake
Adults need between 2,600 and 3,400 mg of potassium per day, depending on sex. Women need about 2,600 mg; men need about 3,400 mg. Pregnant women fall in between at 2,900 mg. One glass of red wine contributes about 187 mg toward those targets, a relatively small share. Even two glasses would only account for about 10–14% of a woman’s daily needs.
Most people don’t get enough potassium from their diet as it is, so the amount in a glass of wine isn’t something to worry about from an excess standpoint. Fruits, vegetables, beans, and dairy are far more significant contributors.
Potassium in Wine and Kidney Health
For people with chronic kidney disease, potassium intake matters more because damaged kidneys struggle to filter excess potassium from the blood. If you’re on a potassium-restricted diet, even moderate sources like wine are worth tracking. A single 5-ounce glass of red wine isn’t an enormous load, but it adds up alongside food choices throughout the day. White wine, with its lower potassium content, may be a better fit if you’re watching your numbers closely.
The American Kidney Fund notes that one standard drink a few times a week does not appear to worsen kidney disease or increase the risk of needing dialysis. But there are practical considerations beyond potassium alone. Alcohol interacts with many medications commonly prescribed for kidney disease. It can raise blood pressure and heart rate. And if you’re on a fluid restriction, the liquid in wine counts toward your daily limit. The potassium content is one piece of a larger puzzle for anyone managing kidney function.
Why Potassium Levels Vary Between Bottles
Not all wines of the same color have identical potassium levels. The amount depends on the grape variety, the rootstock the vine was grafted onto, the mineral composition of the soil, and whether the vineyard was irrigated. Grapes grown in potassium-rich soils absorb more of the mineral, and that carries through into the finished wine. Potassium moves into the fruit as grapes begin ripening, so harvest timing also plays a role.
Winemaking choices matter too. Longer skin contact during fermentation extracts more potassium. Cold storage and aging cause some potassium to crystallize and settle out, lowering the final concentration. This is why a bold, heavily extracted red that spent weeks on its skins will generally contain more potassium than a lightly pressed white that was quickly separated from its grape solids. Dessert wines, which often come from very ripe, concentrated grapes, can also land on the higher end.