Oily fish and sheep lanolin are the most common dietary sources of Vitamin D3. This is of course missing from the diets of Vegetarians and Vegans in particular, hence why supplements are strongly recommended. But Vegans do not like using such animal sources and are looking for alternative safe and vegan sources. ULTRA VEGAN VITAMIN D3 provides a new generation natural safe form of 100% Vegan vitamin D that avoids animal fat sourced vitamin D, that expose users to dioxins, heavy metals and other contaminants. Formulated with co-factor avocado sitosterols, ULTRA VEGAN D3 offers a real innovation for all users.