Is vit d3 made with pork or pork products?

Vitamin D3, also known as cholecalciferol, can be derived from two primary sources: animal and plant. The most common animal source is lanolin, which is extracted from sheep's wool, while some forms can be derived from fish liver oil. However, certain synthetic forms of vitamin D3 may be produced using pork products, so it's important for those with dietary restrictions to check the source of the supplement. Always look for products labeled as vegetarian or vegan if you want to avoid animal-derived ingredients.