Neither vodka nor tequila is meaningfully healthier than the other. Both are distilled spirits with nearly identical calorie counts, the same alcohol content at 80 proof, and the same metabolic impact on your liver. The differences that do exist are minor, but they’re worth understanding if you’re choosing between the two.
Calories and Nutritional Content
A standard 1.5-ounce shot of 80-proof vodka contains 97 calories. Tequila at the same proof lands in the same range. Neither contains fat, protein, or meaningful amounts of any vitamin or mineral. Both are essentially just ethanol and water, with trace compounds that affect flavor but not nutrition.
If you’re watching calories, the real variable isn’t which spirit you pick. It’s what you mix it with. A vodka soda and a tequila soda are calorically equivalent. A margarita made with sugary premix can easily triple the calorie count of a neat pour. The spirit itself is a wash.
The Agavin Myth
You may have seen claims that tequila can lower blood sugar or help with weight loss, usually pointing to a compound called agavins found in the agave plant. There is a kernel of real science here, but it doesn’t apply to tequila the way it’s often presented.
Researchers at Mexico’s Centro de Investigación y de Estudios Avanzados did find that mice given agavins in their water ate less, lost weight, and showed lower blood glucose levels compared to mice given other sweeteners. Agavins also appeared to stimulate insulin production. But the researchers themselves noted a critical detail: agavins are converted to ethanol during fermentation. They are not found in the finished tequila product. By the time you’re drinking a shot of tequila, the agavins are gone. Any claim that tequila is a diabetic-friendly spirit based on this research is a misreading of the study.
Congeners and Hangovers
One area where vodka does have a small, measurable advantage is hangover severity. Congeners are toxic byproducts created during fermentation and aging. They stress your nervous system while your liver works to process the alcohol, and they contribute to the headache, nausea, and general misery of a hangover.
Dark liquors contain significantly more congeners than clear ones. Bourbon, as an extreme example, has 37 times the congener content of vodka. Tequila, particularly aged varieties like reposado and añejo, falls on the higher end of the congener spectrum alongside other dark spirits. Blanco (unaged) tequila contains fewer congeners than its aged counterparts but still more than vodka, which is one of the lowest-congener spirits available.
This doesn’t mean vodka won’t give you a hangover. Ethanol itself is the primary driver of hangover symptoms. But if you’re drinking the same amount, vodka is slightly less likely to make the morning after miserable.
Additives and Purity
Tequila regulations allow producers to add up to 1% of the total volume in additives without disclosing them on the label. These can include glycerin for a smoother mouthfeel, caramel coloring, and sugar-based syrups for sweetness. Not all brands use them, and a growing segment of the market specifically markets “additive-free” tequila, but there’s no way to tell from a standard label whether a given bottle contains these ingredients.
Vodka is generally a simpler product. It’s distilled to a high proof and then diluted with water, leaving fewer opportunities for undisclosed additives. Some flavored vodkas do contain added sugars, but unflavored vodka is typically just ethanol and water.
Gluten Concerns
If you have celiac disease or gluten sensitivity, both spirits are considered gluten-free after distillation. Even vodka made from wheat, barley, or rye is safe because the distillation process removes the proteins that trigger a reaction. The U.S. Alcohol and Tobacco Tax and Trade Bureau permits “gluten-free” labeling on distilled products from gluten-containing grains as long as good manufacturing practices are followed. Tequila, made from agave, never contained gluten in the first place. If you want extra peace of mind, choose a vodka made from corn, potatoes, or grapes, or stick with tequila.
What Actually Matters for Health
The health difference between vodka and tequila is negligible compared to the health impact of how much you drink. Your body metabolizes ethanol at the same rate regardless of which spirit delivered it. Blood alcohol concentration is not significantly influenced by the type of alcoholic beverage consumed, according to research published through the National Institutes of Health. A shot of vodka and a shot of tequila hit your liver with the same workload.
The broader scientific consensus has shifted considerably in recent years. Organizations like the World Health Organization now state that no amount of alcohol is truly safe. The old notion that moderate drinking might protect your heart has largely been revised. Public health agencies still define moderate drinking as up to one drink per day for women and up to two for men, with a standard drink being 1.5 ounces of distilled spirits, but that definition reflects a harm-reduction threshold, not a health recommendation.
If you enjoy vodka or tequila and drink in moderation, the choice between them is a matter of taste, not health. Vodka has a slight edge on congeners and hangover potential. Tequila’s supposed blood sugar benefits don’t survive the fermentation process. In every other measurable way, they’re the same drink wearing different labels.