Is Casamigos Tequila Additive-Free?

What Are Tequila Additives?

Under Mexican tequila regulations, producers can add up to 1 percent of a spirit's total weight in certain substances without listing them on the label. There are four permitted categories: glycerin, caramel color, oak extract, and sweeteners, referred to in the rules as sugar-based syrup. These are legal, regulated additives that have been part of commercial tequila for decades, as spirits publications like Tasting Table have documented.

Glycerin adds a perception of smoothness and body. Caramel color can darken a spirit to look more aged. Oak extract fakes the vanilla and wood notes that come from real barrel time. Sweeteners mask bitterness and make a spirit taste more approachable. Used in small amounts, these can meaningfully reshape what ends up in the glass, which is precisely why drinkers who care about process have started tracking them.

The 1 percent threshold sits below mandatory labeling requirements. A producer can use any or all of these additives within that ceiling and has no legal obligation to tell you. From the bottle alone, the consumer has no way to know.

Is Casamigos on Any Additive-Free List?

No. Casamigos does not appear on any recognized additive-free verification list, and it has never submitted to independent third-party testing through the platforms drinkers rely on. For years the primary consumer resource was the additive-free list maintained by the Additive Free Alliance alongside Tequila Matchmaker, which tested hundreds of tequilas and published which ones were confirmed clean.

That resource changed in late 2024. As VinePair reported, Mexico's tequila regulator, the Consejo Regulador de Tequila, pressured brands over the use of additive-free language, and Tequila Matchmaker pulled the public list to protect the small producers on it. New certifying authorities are working their way through Mexico's Secretariat of Economy, but the simple public lookup that once existed is not what it was.

None of that helps Casamigos, though. It was never on the verified list to begin with. Its absence is not proof of additives, but combined with the lack of any disclosure from Diageo, it means the brand cannot be described as confirmed clean by anyone independent.

The 2025 Lawsuit Over Casamigos and 100 Percent Agave

The purity question moved from bar-talk to the courtroom in 2025. On May 5, 2025, the firm Hagens Berman filed a class action in federal court in the Eastern District of New York alleging that Casamigos and its sister brand Don Julio, both owned by Diageo, are mislabeled as 100 percent agave while allegedly containing significant concentrations of cane or other alcohol. The complaint, covered by Mezcalistas, leans on Nuclear Magnetic Resonance laboratory testing conducted by the Additive Free Alliance to argue the spirits were adulterated and falsely labeled.

This is a different and more serious claim than the four permitted additives. Adding cane alcohol to something sold as 100 percent agave would breach both the label and the standard itself. It is worth being precise about status: these are allegations, not findings. In November 2025 Diageo moved to dismiss the case, with The Drinks Business reporting that the company called the claims implausible and stood behind its labeling.

As of 2026 the litigation is unresolved and nothing has been proven in court. But for a consumer weighing whether to trust the label, the existence of independent lab testing serious enough to anchor a federal class action is a meaningful data point on its own.

Casamigos vs Verified Traditional Tequila

Here is how Casamigos compares with a field of traditionally made tequilas long recognized as additive-free, across the factors that actually matter for purity.

Why Traditional Tequila Does Not Need Additives

Additives exist to solve a problem, and understanding the problem explains why the best brands never touch them. When agave is harvested young to hit volume targets, the resulting spirit tends to be thin and sharp, which creates a temptation to soften and sweeten it after the fact. Fully mature agave, by contrast, develops deep, complex natural sugars that carry through the whole process.

Traditional producers roast those mature piñas slowly in brick ovens, ferment naturally without shortcuts, and distill in copper pot stills that strip away harshness. Each step builds the smoothness and roundness that additives are designed to imitate. When the process is done right, there is nothing left to fix. That is why the brands most associated with traditional methods are the same ones that have consistently passed independent testing.

It is the inverse of the Casamigos situation. A brand engineered for mass appeal and softness, produced at scale with no disclosure, raises the question. A brand built on mature agave and honest distillation answers it before it is asked.

Additive-Free Alternatives to Casamigos

If you like Casamigos for its smoothness but want a spirit whose smoothness you can actually trust, these traditionally made bottles are where to look.