Is Casein Fining vegan?
Short answer
Casein Fining is not vegan. Some white wines are clarified with milk casein. Not vegan.
Key takeaways
- Verdict: Casein Fining is not vegan.
- Commonly found in: Some Chardonnay and Sauvignon Blanc bottles.
- Vegan alternatives: Bentonite-fined wines, Wines labelled 'vegan'.
- Scan any barcode with VeggieOS (100% free) for an instant vegan verdict.
What it is
Milk protein added to wine to bind with phenolics and clarify the liquid.
Why not vegan
Dairy-derived fining agent. Trace amounts can remain.
What a “Not vegan” verdict means
A not-vegan verdict means the ingredient is animal-derived in essentially all commercial supply, so a product listing it should be treated as non-vegan unless the manufacturer explicitly states a plant-based source in writing.
Where you'll find it
- Some Chardonnay and Sauvignon Blanc bottles
At a glance
| Verdict | ❌ Not vegan |
|---|---|
| Ingredient family | Alcohol and finings |
| Typical products | Some Chardonnay and Sauvignon Blanc bottles |
| Best vegan swap | Bentonite-fined wines |
| Settled by certification? | Not required |
How to read the label
Casein Fining belongs to the alcohol and finings family. These are the terms worth scanning for on any ingredient list in this category:
- Isinglass
- Finings
- Gelatine
- Casein
- Albumin
- Unfined
- Unfiltered
- Bentonite
- Look for 'suitable for vegans' or a vegan trademark on the back label.
- 'Unfined and unfiltered' is a reliable proxy on craft beer and natural wine.
- Check Barnivore for a specific brand and vintage before buying in volume.
- Cask ale in the UK is the highest-risk category — isinglass is traditional.
Mistakes to avoid
| Where it catches people out | What to do |
|---|---|
| Guinness-style stouts | Most major stouts stopped using isinglass, but regional and cask versions may not have. |
| Cheap supermarket wine | Often fined; the vegan label is now common enough that its absence is meaningful. |
| Honey-flavoured liqueurs and meads | Contain honey as an ingredient, not just as a fining. |
Alcohol and finings in context
Wine, beer and cider are made from plants but are routinely clarified with animal-derived finings: isinglass from fish swim bladders, gelatine, egg white and casein all bind haze particles so they can be filtered out.
Finings are processing aids rather than ingredients, so they are not required on the label in most jurisdictions. A bottle can be entirely free of animal ingredients and still be non-vegan.
The trend is strongly positive: bentonite clay, pea protein and PVPP replace the animal options at similar cost, and 'suitable for vegans' is now printed on a large share of supermarket wine.
Does certification help? Because finings are invisible on the label, an explicit vegan statement or a Barnivore entry is the only practical verification for drinks.
Vegan alternatives
- Bentonite-fined wines
- Wines labelled 'vegan'
FAQ
- Can I tell from the label?
- Usually no — check Barnivore or look for a vegan certification mark.
- Does isinglass remain in the finished beer?
- Only trace amounts. Vegans avoid it because a fish product was used in production, not because of the residue.
- Are spirits vegan?
- Most distilled spirits are, since distillation removes fining agents. Cream liqueurs and honey-based spirits are the exceptions.
Sources
Last reviewed June 4, 2026