Vegan Vitamin D3: Algae vs Lanolin (and Why the Source Matters)
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Short answer: algae-sourced vitamin D3 is the same active molecule as lanolin-derived D3, but it is fully plant-based. If you want the better-absorbed form of vitamin D without an animal source, vegan D3 from algae or lichen is the answer.
D3 vs D2: start with the form
There are two supplemental forms of vitamin D. D3 (cholecalciferol) is the form your skin makes in sunlight. D2 (ergocalciferol) comes from fungi and is often the only "vegan" option people know about. The research favors D3: a head to head comparison found D3 was roughly twice as effective as D2 at raising and maintaining blood levels of 25-hydroxyvitamin D. So the goal for a vegan is to get D3, not settle for D2.
Where D3 comes from
| Source | Form | Vegan? |
|---|---|---|
| Lanolin (sheep wool grease) | D3 | No |
| Algae or lichen | D3 | Yes |
| Fungi or yeast (UV exposed) | D2 | Yes, but D2 |
The vast majority of D3 on the market is extracted from lanolin, the waxy oil in sheep wool. Algae and lichen naturally produce the same cholecalciferol molecule, which means you can get true D3, the better-studied and better-absorbed form, from a plant source.
Does the source change how it works?
No. Cholecalciferol is cholecalciferol. Once it is in the gummy, your body cannot tell whether it started in wool or in algae. What matters is that it is D3 rather than D2, that the dose is sensible, and that the product is third-party tested for potency.
Common questions
Is vegan D3 as good as regular D3? Yes. Algae-derived D3 is chemically identical to lanolin-derived D3. The only difference is the starting material.
Should vegans take D2 instead? D2 works, but the evidence suggests D3 is more effective at raising blood levels, and vegan D3 from algae means you do not have to choose between effectiveness and plant-based.
From On Call Gummies: On Call D3 (2,000 IU, plant-based from algae) and On Call B-12 (500 mcg cyanocobalamin) are vegan, sugar-free, and dosed to match what the research supports. See the full evidence and citations.
This article is educational and not medical advice. It has not been evaluated by the Food and Drug Administration and is not intended to diagnose, treat, cure, or prevent any disease. Talk to your healthcare provider about what is right for you.
References
- Tripkovic L, et al. Comparison of vitamin D2 and vitamin D3 supplementation in raising serum 25-hydroxyvitamin D status. Am J Clin Nutr. 2012;95(6):1357-1364. PMID 22552031
- National Institutes of Health, Office of Dietary Supplements. Vitamin D Fact Sheet for Health Professionals. ods.od.nih.gov