Most straight spirits, dry wines, and hard seltzers fit comfortably within a keto diet. The key is sticking to drinks that contain little or no residual sugar and pairing them with zero-carb mixers. A standard shot of vodka, gin, tequila, whiskey, or rum has zero grams of carbs, making unflavored spirits the simplest choice. From there, your options expand into wines, light beers, and seltzers, each with its own carb tradeoffs worth knowing.
Spirits: The Lowest-Carb Option
Unflavored spirits like vodka, gin, whiskey, tequila, rum, and scotch contain zero carbs and zero sugar. This applies to any unflavored, unsweetened liquor regardless of brand. The catch is what you mix them with. Plain seltzer, diet ginger ale, and diet tonic water all clock in at 0 grams of carbs per 12-ounce serving, making them ideal mixers. A vodka soda or gin and diet tonic keeps your drink at essentially zero carbs.
Regular mixers are where things go sideways fast. Standard tonic water, orange juice, margarita mix, regular soda, and energy drinks are loaded with sugar. Even a single pour of cranberry juice cocktail or cola can add 20 to 40 grams of carbs, enough to use up your entire daily keto allowance in one glass. If you’re ordering at a bar, specify diet or sugar-free versions of any mixer, or just go with seltzer and a squeeze of lime.
Flavored spirits are also worth watching. Flavored vodkas, spiced rums, and liqueurs like triple sec or amaretto often contain added sugar that doesn’t appear on a label (alcohol is exempt from standard nutrition labeling in the U.S.). When in doubt, stick with the unflavored version.
Dry Wine: 1 to 4 Grams per Glass
A standard 5-ounce glass of dry table wine contains roughly 1 to 4 grams of carbs. That’s a small enough amount to fit into most keto plans without much concern, especially if you’re limiting yourself to one or two glasses. Red wines like Cabernet Sauvignon and Pinot Noir tend to land on the lower end, around 1 to 2 grams of carbs from grape skin and seed extracts plus 0 to 2 grams from residual sugar. Dry whites like Chardonnay and Sauvignon Blanc typically carry 0 to 4 grams from leftover grape sugars.
The word to look for is “dry.” Dry wines have had nearly all their grape sugar converted to alcohol during fermentation. Off-dry, semi-sweet, and dessert wines are a different story entirely. A glass of Moscato, Riesling (unless labeled “dry” or “trocken”), or port can contain 10 to 20+ grams of sugar. Late-harvest wines and ice wines are even higher.
Champagne and Sparkling Wine
Sparkling wines are categorized by how much sugar is added after fermentation, a step called dosage. The label tells you exactly where a bottle falls on the sweetness scale, and European regulations define these terms precisely:
- Brut Nature / Zero Dosage: Less than 3 grams of sugar per liter, the driest option available
- Extra Brut: 0 to 6 grams of sugar per liter
- Brut: Less than 12 grams of sugar per liter
A standard 5-ounce pour from a Brut Nature bottle works out to less than half a gram of sugar. Even a regular Brut champagne stays under about 2 grams per glass. Once you move into “Extra Dry” (which, confusingly, is sweeter than Brut), “Sec,” or “Demi-Sec” categories, the sugar content climbs quickly. Stick with Brut or drier for keto purposes.
Beer and Hard Seltzers
Standard beer is one of the least keto-friendly alcohol options. A typical craft IPA or stout can contain 15 to 30 grams of carbs per 12-ounce serving, mostly from unfermented grain sugars. Light American lagers from brands like Miller, Coors, and Budweiser are significantly lower, averaging 3 to 7 grams of carbs per can. That’s manageable on keto if you stop at one, but it adds up faster than spirits or wine.
Hard seltzers are a better bet for beer-style convenience. Most low-carb hard seltzers average around 2 grams of carbs per 12-ounce can. They’re typically made from a fermented sugar base with added flavoring rather than grain, which keeps the carb count minimal. A vodka seltzer (vodka mixed with plain carbonated water) comes in at roughly the same, around 2 grams per serving.
How Alcohol Affects Ketosis
Even zero-carb alcohol affects your metabolism in ways that matter on keto. Your liver treats alcohol as a priority toxin, meaning it pauses other metabolic tasks, including burning fat, until the alcohol is processed. This doesn’t necessarily knock you out of ketosis, but it temporarily stalls the fat-burning process that ketosis is built on.
Interestingly, research published in the Journal of Clinical Investigation found that alcohol consumption can actually increase ketone production in the hours after drinking, likely because ethanol depletes the liver’s stored glycogen and shifts the body toward burning fatty acids. But this isn’t the productive kind of ketosis you’re after on a keto diet. It’s a metabolic stress response, and it doesn’t translate to faster fat loss.
Alcohol also delivers 7 calories per gram, nearly as calorie-dense as fat (9 calories per gram) and almost double that of carbs or protein (4 calories per gram). These calories don’t show up as carbs on a tracker, but your body still has to process them before it returns to burning dietary or stored fat. This is why regular drinking, even with zero-carb choices, is one of the most common causes of stalled weight loss on keto. A couple of drinks two or three times a week can add 500 to 1,000 extra calories that your body burns through before it touches any fat stores.
Drinks to Avoid on Keto
Some categories are reliably high in carbs and worth skipping entirely:
- Sweet cocktails: Margaritas, piña coladas, daiquiris, and cosmopolitans rely on sugar-heavy mixers and liqueurs. A single frozen margarita can pack 30 to 60 grams of carbs.
- Regular beer: Ales, stouts, porters, wheat beers, and most craft varieties run 15 grams of carbs or higher.
- Sweet wines: Moscato, port, sherry (cream style), late-harvest Riesling, and dessert wines.
- Flavored malt beverages: Hard lemonades, wine coolers, and similar products are essentially sugar-sweetened alcohol.
- Mixers: Regular soda, juice, tonic water, simple syrup, and energy drinks.
Practical Tips for Drinking on Keto
People on keto frequently report feeling the effects of alcohol faster and more intensely. When your glycogen stores are depleted, which they typically are on a very low-carb diet, alcohol hits your bloodstream with less of a buffer. This means your usual two-drink tolerance might feel more like three or four. Pacing yourself and alternating alcoholic drinks with water helps.
If you’re tracking macros, count the carbs from your drinks the same way you’d count food. Two glasses of dry red wine at dinner adds roughly 2 to 4 grams of carbs, which is easy to absorb into a 20- to 50-gram daily limit. But two beers and a mixed drink could push you over. Planning your drinks into your daily carb budget, rather than treating them as extras, keeps you from accidentally overdoing it.
Moderate drinking is defined by the CDC as two drinks or fewer per day for men and one drink or fewer per day for women. On keto, there’s a practical reason to stay at or below those numbers: the metabolic slowdown from alcohol processing compounds with each additional drink, and the calorie load stacks up quickly even when carbs stay low.