Is cholecalciferol vegan?

Cholecalciferol is the scientific name for vitamin D3, a fat-soluble vitamin. It is commercially produced by exposing sterols to ultraviolet irradiation. The most common commercial source is 7-dehydrocholesterol obtained from lanolin, a waxy substance washed from sheep wool. Alternatively, it can be harvested and processed from plant-based sources such as lichen or cultivated algae. Food manufacturers frequently add cholecalciferol to fortified foods, including breakfast cereals, plant milks, margarines, fruit juices, and dietary supplements.

The ingredient is classified as possibly vegan because it can be derived from either animal or plant origins, and ingredient labels rarely disclose the raw material used. Animal-derived cholecalciferol from sheep lanolin is the industry standard due to widespread availability, whereas plant-based versions are extracted from lichen or algae. Unless the packaging displays a vegan certification or explicitly specifies that the vitamin D3 is plant-sourced, consumers cannot determine its origin from the label alone. A vegan certification or direct confirmation from the manufacturer is required to verify that the ingredient is plant-based.