Is Ascorbic Acid (Vitamin C, E300) vegan?
Short answer
Ascorbic Acid (Vitamin C, E300) is vegan. Commercial vitamin C is fermented from corn glucose. Vegan.
Key takeaways
- Verdict: Ascorbic Acid (Vitamin C, E300) is vegan.
- Commonly found in: Beverages, Supplements, Cured meat alternatives, Antioxidant in flour.
- Vegan alternatives: Already vegan.
- Scan any barcode with VeggieOS (100% free) for an instant vegan verdict.
What it is
Synthetic L-ascorbic acid produced by the Reichstein process from glucose.
Why vegan
Plant/microbial sourcing — no animal inputs.
What a “Vegan” verdict means
A vegan verdict means the ingredient itself contains no animal-derived material and is not conventionally produced using animal inputs. It does not guarantee the finished product is vegan: the same label can carry dairy, egg or honey elsewhere in the list, and shared production lines can add 'may contain milk' warnings.
Where you'll find it
- Beverages
- Supplements
- Cured meat alternatives
- Antioxidant in flour
At a glance
| Verdict | ✅ Vegan |
|---|---|
| Ingredient family | Vitamins and supplements |
| E-number / code | E300 |
| Typical products | Beverages, Supplements, Cured meat alternatives, Antioxidant in flour |
| Best vegan swap | Already vegan |
| Settled by certification? | Not required |
How to read the label
Ascorbic Acid (Vitamin C, E300) belongs to the vitamins and supplements family. These are the terms worth scanning for on any ingredient list in this category:
- Cholecalciferol
- Vitamin D3
- Lanolin
- Gelatine capsule
- Fish oil
- Omega-3
- Shellac coating
- Stearic acid
- Prefer D2 (ergocalciferol) or D3 explicitly labelled 'from lichen'.
- Look for 'vegetarian capsule', 'HPMC' or 'pullulan' on the shell.
- Choose algal oil for EPA and DHA rather than fish or krill.
- Check tablet coatings — shellac and carnauba are both used, only carnauba is vegan.
Mistakes to avoid
| Where it catches people out | What to do |
|---|---|
| Fortified plant milk | The added D can still be lanolin D3. Brands that use lichen say so prominently. |
| Multivitamin gummies | Gelatine base plus beeswax polish is the standard formulation. |
| Magnesium stearate | Usually vegetable but can be tallow-derived; ask if it matters to you. |
Vitamins and supplements in context
Fortification quietly reintroduces animal ingredients into otherwise plant-based food. Vitamin D3 is conventionally made from lanolin in sheep's wool, omega-3 from fish oil, and some vitamin A and E preparations use animal-derived carriers.
Plant-based routes exist for nearly all of them: lichen-derived D3, algal DHA and EPA, and synthetic or vegetable-sourced tocopherols. They cost more, so the default in cheap fortified products is the animal route.
Capsule shells matter as much as the contents — most soft-gel and many hard capsules are gelatine, while vegan supplements use HPMC (hydroxypropyl methylcellulose) or pullulan.
Does certification help? Supplements are a category where vegan certification genuinely pays: it covers both the active ingredient source and the capsule shell, which the ingredient panel often obscures.
Vegan alternatives
- Already vegan
FAQ
- Is whole-food vitamin C better?
- Bioavailability is similar; whole-food sources add fibre and phytonutrients.
- Is vitamin D3 always non-vegan?
- No. Lichen-derived D3 is chemically identical and fully plant-based; it is labelled explicitly because it costs more.
- Do vegans need B12 supplements?
- Yes. Reliable B12 comes from fortified foods or supplements, and cyanocobalamin is produced by bacterial fermentation, so it is vegan.
Sources
Last reviewed June 4, 2026