It surprises a lot of people to learn that a glass of wine, made from nothing but grapes, is not automatically vegan. The reason has nothing to do with the ingredients you would expect and everything to do with a step most drinkers never think about: fining, the clarification process that removes tiny suspended particles to give wine and beer their clear, bright appearance before bottling.
What fining actually is and why it’s used
Freshly fermented wine and beer are naturally hazy, cloudy with proteins, tannins, and yeast particles left over from fermentation. Fining agents are added to bind with these particles and help them settle out or filter more easily, producing the clear, bright liquid consumers expect. Some fining agents are entirely mineral or plant based, like bentonite clay or pea protein, but a long tradition in winemaking and brewing relies on animal derived agents instead, largely because they have historically been effective and inexpensive.
The common animal derived fining agents
- Isinglass: a collagen based substance derived from fish bladders, historically one of the most common fining agents in beer production
- Gelatin: made from boiled animal bones, skin, and connective tissue, used in both wine and beer clarification
- Egg albumin: dried egg whites, traditionally used in fining certain red wines, particularly in Bordeaux style production
- Casein: a milk protein used to remove excess tannins and browning compounds, particularly in white wine production
- Chitin: derived from crustacean shells, occasionally used as an alternative to isinglass in some wine and beer production
Why this doesn’t show up on the label
The reason most drinkers have no idea their favorite wine or beer might involve animal products traces back to how fining agents function. Because they are used purely as a processing aid and bind with the particles they are removing rather than remaining in the finished product, most food labeling regulations do not require them to be disclosed as ingredients, since technically very little to none of the fining agent itself ends up in what you actually drink. This is legally sound but genuinely unhelpful for anyone trying to make an informed choice, since a bottle can be produced using fish bladder derived isinglass with absolutely no mention of it anywhere on the label.
How to actually find vegan wine and beer
The most reliable approach is looking for products explicitly labeled vegan or checking dedicated databases that track fining agents by brand and specific bottling, since even within a single winery’s lineup, different wines can use different fining methods. Many producers have shifted toward plant based alternatives like pea protein, bentonite clay, and activated charcoal specifically to capture the growing vegan and vegetarian market, and this shift has accelerated noticeably over the past several years as demand has grown. The Vegan Society operates a trademark certification program that some wine and beer producers use specifically to signal their products avoid animal derived processing aids entirely, giving consumers a much faster way to identify compliant products than researching each bottle individually.
Why unfined and unfiltered isn’t automatically the answer
Some natural wine producers skip fining altogether, producing what is labeled unfined or unfiltered wine, and it is tempting to assume this automatically makes a bottle vegan. That is often true, but not guaranteed, since a winery could still use animal derived products elsewhere in the process, and the absence of fining says nothing about other production choices. It is also worth noting that unfined wines tend to be hazier in appearance and can develop more sediment over time, a genuine tradeoff some drinkers enjoy for the flavor complexity it can preserve and others find simply looks unappetizing in the glass.
Craft beer’s parallel evolution
The craft beer world has moved somewhat faster than wine on this front, largely because isinglass use has become less universal as more breweries adopt cold crashing and centrifugation, mechanical clarification methods that achieve a similarly clear final product without any animal derived fining agent at all. Many craft breweries now proactively advertise their beers as vegan friendly specifically because they have already moved to these mechanical methods for other quality reasons, making vegan compliance something of an accidental byproduct of modern brewing technique rather than a deliberate ethical choice in every case, though plenty of breweries do market it deliberately as well.
Why this matters beyond the technical detail
For anyone who has chosen a plant based lifestyle specifically to reduce their consumption of animal derived products, discovering that a glass of red wine might have been clarified using fish bladder collagen or dried egg whites can feel like a genuine blind spot in an otherwise carefully considered diet. Advocacy organizations like PETA have published guidance specifically flagging this issue for years, pushing for clearer labeling requirements around processing aids, though regulatory change on this front has been slow across most major wine producing regions. Until labeling requirements catch up, checking a dedicated vegan wine and beer database or looking for explicit vegan certification remains the most reliable way to actually know what went into clarifying your drink before it reached the glass.
What to actually ask for at a restaurant or bar
Restaurant wine lists rarely include fining information, and servers are usually not trained to know the answer either, so the most practical approach in a dining setting is to ask whether the house carries any wines specifically marketed as vegan, a question that has become common enough in 2026 that many wine focused restaurants now flag at least a few bottles on the list this way. For beer, asking whether a brewery uses cold filtration rather than traditional fining is a more specific and often more successful question, since bar staff at craft focused venues tend to know their supplier’s production methods better than a typical wine list turnover allows for.
A small detail with a genuinely bigger footprint than expected
Fining agents are a genuinely easy thing to overlook, since nothing about the finished bottle gives any visual or textural clue about how it was clarified. But given how widespread animal derived fining remains across conventional wine and beer production, it is one of the more common ways non-vegan animal products end up in an otherwise plant based evening without anyone realizing it. The good news is that the plant based alternatives work just as well, and a growing number of producers have made the switch, meaning finding a genuinely vegan bottle in 2026 is considerably easier than it was even five years ago.
