Is vitamin D3 vegan? A UK guide to vitamin D and going plant-based

Last reviewed 16 October 2026Next review April 20274 sources

Yes — vitamin D3 can be vegan. But most of it on UK shelves isn’t. The standard version of D3 (cholecalciferol) is made from lanolin, extracted from sheep’s wool, which rules it out for anyone avoiding animal-derived ingredients. A genuinely vegan version exists too, made from lichen. This guide explains the difference between D2 and D3, how much the NHS actually says you need, what low vitamin D can mean, and what to check on a label if going vegan matters to you.

Why the NHS advises most people in the UK to consider vitamin D in autumn and winter

The NHS recommends that everyone in the UK aged 4 and over consider a daily 10 microgram (400 IU) vitamin D supplement during autumn and winter — October to March. The reason is straightforward: your body makes vitamin D when UVB rays from sunlight hit your skin, and for roughly half the year, UK daylight isn’t strong enough for that to happen reliably, whatever the weather looks like outside.

Some groups are advised to take a supplement all year round rather than just in winter: people who get little or no sun exposure, anyone in a care home, people with darker skin (the British Heart Foundation notes this applies particularly to those of South Asian, African, Caribbean or Black African descent, whose skin needs more sun exposure to produce the same amount of vitamin D), and children aged 1 to 4.

Food supplies very little of it — oily fish, egg yolks and fortified foods are about the only sources, and the NHS is clear that most people can’t get enough from diet alone. That combination of a short window of useful sunlight and few dietary sources is why the NHS advises most people to consider a vitamin D supplement in autumn and winter, rather than only people with a diagnosed deficiency.

Is vitamin D3 vegan?

Not by default. Vitamin D3 (cholecalciferol) is the form your skin makes from sunlight, and it’s also the form most supplement manufacturers use. The problem for vegans is where it usually comes from: standard D3 is extracted from lanolin, the oil in sheep’s wool. It’s an animal by-product, not a slaughter by-product, but it’s an animal product all the same, and it rules D3 out for most vegans by default.

There is a genuinely vegan source of D3, though it’s less common: lichen. Lichen extract — usually from a species called Cladonia rangiferina, also known as reindeer lichen — can be processed into cholecalciferol without any animal input at all. Vitamin D2 (ergocalciferol) is the other vegan option, and it’s vegan by nature rather than by special sourcing: it’s made from irradiated fungal or yeast sterols, most often from mushrooms or yeast.

Neither vegan option is labelled that way automatically — a product simply listing “vitamin D3” with no further detail is very likely lanolin-derived. If going vegan matters to you, the label needs to say so explicitly, or name the source.

What is vegan vitamin D3 made from?

Lichen — specifically Cladonia rangiferina, reindeer lichen. It’s a slow-growing organism that isn’t a plant: it’s a partnership between a fungus and an alga, and it’s currently the only widely available source of true vegan D3. It’s more expensive to process than lanolin, which is part of why lanolin-derived D3 remains the default across most of the market.

How much vitamin D should you actually take?

The NHS standard recommendation is 10 micrograms (400 IU) a day for most adults and children over 4. Some products are formulated at higher strengths — 25µg is common on UK shelves — aimed at people whose GP or blood test results suggest they need more, rather than as a default.

There’s an upper limit worth knowing: the NHS advises against taking more than 100 micrograms (4,000 IU) a day unless a doctor has specifically told you to, since very high doses over long periods can cause problems with how your body manages calcium. This is general guidance, not personal medical advice — if you have a health condition, take prescribed medication, or aren’t sure what dose is right for you, that’s a conversation for your GP or pharmacist rather than a supplement label.

Vegan D: NeoLife’s vitamin D supplement

NeoLife Vegan D is the vitamin D tablet we sell, and its vitamin D comes from a blend of sources: mushroom extract (Agaricus bisporus) and lichen extract (Cladonia rangiferina) — the vegan D3 source above — alongside added vitamin D2 (ergocalciferol). Each tablet provides 10µg of vitamin D, which is 200% of the Nutrient Reference Value and matches the NHS’s standard daily recommendation exactly. The recommended intake is one tablet a day.

Because the amount per tablet clears the threshold for a significant source of the nutrient, vitamin D can carry these authorised claims: vitamin D contributes to the normal absorption and utilisation of calcium and phosphorus, to the maintenance of normal bones and teeth, to the maintenance of normal muscle function and to the normal function of the immune system. These are the standard, government-approved wording for vitamin D generally — they describe what the nutrient does, not a promise about how you personally will feel.

A bottle holds 120 tablets — four months at one a day — for £25.00, which works out at 21p a tablet.

See Vegan D’s full details and order it here.

When to speak to a pharmacist instead

Vitamin D can interact with certain medications, including some heart and blood pressure treatments and drugs affecting how your body handles calcium. If you take prescribed medication, are pregnant or breastfeeding, or have a diagnosed health condition, check with your GP or pharmacist before starting any new supplement. That applies whichever vitamin D product you’re looking at, ours included — this article is general information, not a substitute for advice tailored to you.

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