Not as far as anyone can confirm. Kellogg's Frosted Flakes have no obvious animal ingredient, but the label lists vitamin D3 without saying where it comes from, and Kellogg's does not call the cereal vegan. Because D3 in fortified foods is commonly made from sheep-wool lanolin, strict vegans should treat original Frosted Flakes as a no.
What's in Kellogg's Frosted Flakes
Kellogg's product page lists: milled corn, sugar, malt flavor, 2% or less of salt, plus vitamins and minerals (iron, niacinamide, vitamin B6, vitamin B2, vitamin B1, folic acid, vitamin D3 and vitamin B12). A retailer listing for the single-serve cup shows the same list. Kellogg's own FAQ describes the cereal as four simple ingredients plus vitamins and minerals, and says the malt flavor comes from corn and barley.
Ingredient-by-ingredient check
| Ingredient | What the sources say | Vegan? |
|---|---|---|
| Milled corn | Plant ingredient | Yes |
| Sugar | Kellogg's says "real sugar" but not how it is refined | Unknown. See the bone char sugar guide |
| Malt flavor | Derived from corn and barley, per Kellogg's | Yes (not gluten-free) |
| Iron, niacinamide, B vitamins, folic acid | No animal source flagged in the sources I checked | No concern found |
| Vitamin D3 | Listed on the label, source not stated | Unconfirmed |
Why vitamin D3 is the sticking point
Vitamin D3 (cholecalciferol) used in fortification is often made from lanolin, a wax from sheep's wool. Plant-based routes exist, such as vitamin D2 or D3 from lichen, but the label only says "vitamin D3". Animal Aid says most of Kellogg's UK range uses lanolin-derived D3. I found no equivalent statement from Kellogg's for the US Frosted Flakes, in either direction, so the honest status is unconfirmed. The same issue is why Cheerios and Cinnamon Toast Crunch fail for strict vegans, where the brand has confirmed a lanolin source. The amount is tiny, so where you draw the line is personal, but if it is lanolin, it is an animal-derived ingredient.
Is Frosted Flakes vegan? The verdict
Original Frosted Flakes: not confirmed vegan, so skip them if you are strict. There is no milk, egg, gelatin or honey in the ingredient list, and a vegetarian can eat them. The unnamed D3 source and the lack of any vegan claim are what stop a yes. Other versions need their own label check. Honey Nut has honey in the name, and marshmallow or flavored versions add ingredients the original does not have. Check marshmallow cereals for gelatin, as in Lucky Charms.
Frosted Flakes versions and alternatives, brand by brand
| Product | What the label or brand says | Verdict |
|---|---|---|
| Kellogg's Frosted Flakes (original) | Lists vitamin D3, source not stated; no vegan claim | Not confirmed. Skip if strict |
| Kellogg's Frosted Flakes Honey Nut | Honey in the name; check the label | Assume no until the label says otherwise |
| Store-brand frosted flakes (Harvest Morn, Wegmans) | Open Food Facts transcriptions list "vitamin D" with no source | Unconfirmed, same issue |
| Nature's Path Fruit Juice Sweetened Corn Flakes | Organic corn meal and/or corn flour, pear juice concentrate, sea salt; labeled vegan by the brand and retailers | Vegan per brand. I did not confirm a third-party certification |
| Nature's Path Honey'd Corn Flakes | Lists honey | Not vegan |
If you want a corn flake that is vegan on the brand's own say-so, Nature's Path Fruit Juice Sweetened Corn Flakes is the one to start with. It is not frosted and it is unfortified, so expect a plainer flake and plan your micronutrients elsewhere. Check price on Amazon (affiliate link). For more picks, see our best vegan cereal brands.
How to check any cereal label
- Find the vitamin line. "Vitamin D2" or "ergocalciferol" is plant-based. "Vitamin D3" or "cholecalciferol" with no source is unconfirmed.
- Look for honey, gelatin (common in marshmallow pieces), milk powder and carmine.
- Treat "natural flavors" as unverified unless the brand says otherwise.
- Look for a vegan claim or third-party certification on the box, or ask the brand directly.
- Paste the list into the SP Vegan ingredient checker.
Sources
- WK Kellogg Co: Frosted Flakes FAQ
- WK Kellogg Co: Frosted Flakes product page (ingredients)
- Lowes Foods listing: Frosted Flakes 2.1 oz cup (ingredients)
- Animal Aid: Kellogg's, please make it vegan (UK vitamin D3 source)
- Open Food Facts: Harvest Morn Frosted Flakes
- Open Food Facts: Wegmans Frosted Flakes
- ShopRite listing: Nature's Path Fruit Juice Corn Flakes (ingredients, vegan label)
- Nature's Path: Fruit Juice Sweetened Corn Flakes (Canada product page, vegan tag)
- Whole Foods listing: Nature's Path Honey'd Corn Flakes (ingredients)
Ingredients checked November 2026. Formulas change; always read the label.
