Neither tequila nor whiskey is meaningfully healthier than the other. Both are distilled spirits with roughly the same calorie count, the same alcohol content, and the same health risks when consumed in excess. The differences that do exist are minor and unlikely to change your health outcomes in any practical way.
That said, there are real differences between the two worth understanding, especially if you’re trying to make a slightly smarter choice at the bar.
Calories and Sugar Are Nearly Identical
A standard 1.5-ounce shot of 80-proof whiskey contains about 97 calories. Tequila at the same proof comes in at the same range. Bump up to 94-proof whiskey and you’re looking at around 116 calories per shot, simply because higher alcohol content means more calories. The same principle applies to higher-proof tequilas.
Neither spirit contains significant sugar or carbohydrates in its pure form. Distillation strips out virtually all the sugars from the original ingredients, whether that’s agave for tequila or grain for whiskey. The calories come almost entirely from the alcohol itself. Where sugar sneaks in is through what you mix with your drink. A margarita made with sweet-and-sour mix can easily triple the calorie count of a straight tequila shot. Whiskey mixed with cola does the same. If calories matter to you, the mixer is a far bigger variable than which spirit you choose.
The Agavins Myth
One of the most persistent claims about tequila is that it contains agavins, a type of fiber found in raw agave plants, which some studies have linked to lower blood sugar and improved gut health. You’ll see this repeated across social media and wellness blogs. It’s misleading.
Agavins are present in the agave plant before fermentation. During tequila production, yeast converts those sugars into alcohol. The liquid is then distilled and filtered, leaving behind mostly pure ethanol and water. The agavins don’t survive this process in any meaningful amount. The same goes for claims about tequila being a source of probiotics. Fermentation does involve live microorganisms, but distillation, which involves heating the liquid to the point of vaporization, destroys them. By the time tequila reaches your glass, there are no living probiotics in it.
Whiskey Has a Slight Edge in Antioxidants
Whiskey, particularly barrel-aged varieties, contains small amounts of ellagic acid, an antioxidant also found in berries. Some lab studies suggest ellagic acid can kill cancer cells and reduce inflammation. That sounds impressive, but the amounts present in whiskey are tiny. You’d need to drink far more than is safe to get a therapeutic dose, and the damage from the alcohol itself would vastly outweigh any antioxidant benefit.
Tequila doesn’t have an equivalent antioxidant profile. So if you’re comparing the two on this single metric, whiskey has a marginal advantage. But calling whiskey “healthy” because of its ellagic acid content is like calling a candy bar nutritious because it contains a few peanuts.
Congeners and Hangovers
Congeners are chemical byproducts of fermentation and aging. They contribute to a spirit’s flavor, color, and aroma, but they also contribute to hangover severity. Darker spirits generally contain higher levels of congeners, which is why bourbon and brandy have a reputation for rougher mornings after.
Here’s where it gets interesting. You might assume clear tequila (blanco) would be low in congeners like vodka or gin. It’s not. Tequila, even unaged varieties, contains relatively high levels of congeners. This is an exception to the “clear spirits are gentler” rule. Dark whiskeys like bourbon are also high in congeners, so neither spirit gives you a clear advantage when it comes to avoiding hangovers.
The biggest factor in hangover severity remains the simplest one: how much you drink. Congener levels matter at the margins, but volume of alcohol consumed matters far more.
Gluten Sensitivity and Tequila
If you have celiac disease or gluten sensitivity, tequila does have one genuine advantage. It’s made from agave, which is naturally gluten-free. Whiskey is made from grains like wheat, barley, or rye, all of which contain gluten. However, the distillation process removes gluten proteins, and pure distilled whiskey is generally considered safe for people with celiac disease. The Alcohol and Tobacco Tax and Trade Bureau even permits “gluten-free” labeling on distilled spirits made from gluten-containing grains, provided good manufacturing practices are followed.
The risk comes from flavored whiskeys or products that add ingredients after distillation. These can reintroduce gluten. There’s also a small risk of cross-contact in facilities that handle wheat, barley, or rye. If you’re highly sensitive, tequila eliminates that uncertainty entirely, as long as you choose 100% agave tequila rather than a “mixto” that may use other sugar sources during fermentation.
Hidden Additives in Both Spirits
One factor that rarely comes up in the “which is healthier” debate is additives. Tequila’s regulatory body, the Consejo Regulador del Tequila, permits four additives in any tequila, including bottles labeled “100% agave”: caramel coloring, oak extract, glycerin, and sugar syrup. Brands can use these up to 1% of total volume without disclosing them on the label. So a tequila marketed as pure and natural might still contain added sweeteners and artificial color.
Whiskey has its own additive landscape. Caramel coloring is widely used in Scotch and other whiskey styles to ensure consistent color from batch to batch. American bourbon has stricter rules and generally prohibits added color or flavor, but other whiskey categories are less regulated on this front. If avoiding hidden ingredients matters to you, look specifically for additive-free tequila brands (a growing category) or straight bourbon, which has the tightest restrictions.
Your Body Processes Them the Same Way
A common belief is that tequila is metabolized differently because it comes from agave rather than grain. There’s no evidence for this. Ethanol is ethanol regardless of its plant source. Your liver breaks down tequila and whiskey through the same enzymatic pathway at the same rate, roughly one standard drink per hour. The perception that tequila “hits different” likely comes from how it’s consumed. Shots taken quickly on an empty stomach will feel more intense than whiskey sipped slowly over ice, but that’s behavior, not biochemistry.
At the end of the day, the health impact of either spirit depends almost entirely on how much you drink, how often, and what you mix it with. Choosing tequila over whiskey, or vice versa, won’t move the needle on your health in any measurable way. The one exception is if you have a specific dietary concern like gluten sensitivity, where tequila’s agave base offers a real, if modest, practical advantage.