Here's something most supplement brands don't tell you: the vitamin D3 in the majority of supplements on the market -from capsules to gummies to fortified foods- comes from sheep's wool.
That's not a scare tactic. It's just a fact that most consumers don't know, and that matters a great deal if you're vegetarian, vegan, or simply someone who wants to know what's actually in your vitamins.
What Is Lanolin?
Lanolin is a waxy substance secreted by the sebaceous glands of wool-bearing animals, mostly sheep. It coats their wool and acts as a natural waterproofing agent. In the supplement industry, lanolin is used as the primary raw material for producing cholecalciferol, the form of vitamin D3 found in most supplements.
The process works like this: lanolin is extracted from raw wool, then irradiated with UV light to convert 7-dehydrocholesterol (a compound naturally present in lanolin) into vitamin D3. The resulting cholecalciferol is chemically identical to the D3 your skin produces when exposed to sunlight; it's bioidentical to human vitamin D3, which is why it's used so widely.
There's nothing dangerous about lanolin-sourced D3. It's effective, well-studied, and generally recognized as safe. But it is an animal-derived ingredient, and for a meaningful percentage of consumers, that matters.
What Is Lichen-Sourced D3?
Lichen is a composite organism; technically a symbiosis of algae (or cyanobacteria) and fungi, that grows on rocks, trees, and soil. Some species of lichen naturally biosynthesize vitamin D3, making them the only non-animal source of D3 (as opposed to D2, which comes from yeast or fungi but has different bioavailability).
Lichen-sourced D3 is produced by extracting and concentrating the cholecalciferol naturally present in these organisms. The resulting vitamin D3 is chemically identical to both lanolin-sourced D3 and the D3 your body makes, it's not a different molecule, just a different origin.
Is Lichen D3 as Effective as Lanolin D3?
Yes. Multiple studies comparing lichen-sourced and lanolin-sourced D3 have found equivalent bioavailability. Both raise serum 25-hydroxyvitamin D (the standard blood marker for vitamin D status) at the same rate and to the same extent. This is expected, since the molecule is identical regardless of source.
The difference is entirely about origin, not efficacy.
Why Vitamin Hive Uses Lichen-Sourced D3
When I was formulating Vitamin Hive's D3+K2 gummies, I wanted to create a supplement I could comfortably recommend to every patient, regardless of their dietary background. That meant including vegetarians, people who keep halal or kosher, and anyone who simply prefers plant-derived ingredients where available.
Lichen D3 was the obvious choice. It delivers the same therapeutic benefit as lanolin D3, fits within a clean-label formulation, and allows us to honestly say there are no animal-derived active ingredients in the formula.
(The formula does contain manuka honey, making it vegetarian but not vegan, we've always been transparent about that.)
A Note on Vitamin D2 vs. D3
You may have seen vitamin D supplements labeled "D2" rather than "D3." D2 (ergocalciferol) is derived from yeast or fungi and is fully plant-based. However, research consistently shows that D3 raises and maintains blood levels of vitamin D more effectively than D2. If you're choosing a plant-sourced vitamin D supplement, lichen-derived D3 is the better option over D2.
What This Means When You're Shopping
Reading supplement labels takes practice. Here's what to look for:
- For plant-based D3: look for "(from lichen)" or "vegan cholecalciferol" next to Vitamin D3 in the Supplement Facts panel
- If it says "Vitamin D3 (as cholecalciferol)" with no source specified - it's from lanolin
- If it says "Vitamin D2 (as ergocalciferol)" - it's plant-derived but less potent than D3
Small parenthetical details on a supplement label carry a lot of meaning. The more familiar you are with reading them, the easier it becomes to find products that truly match your values.