Is margarine vegan? This is probably one of the most frequently asked questions that visitors to this site email me. The confusion perhaps lies in the fact that while margarine is not dairy-based, like butter, is often does contain trace amounts of animal products. While many small are not bothered by such a small amount of dairy - usually in the form of whey or lactose - those with dairy allergies and strict vegans will want to use a product that is completely free of even small amounts of dairy. So, is there such a thing as a 100% dairy-free and vegan margarine? The answer is yes! Read on to learn more about vegan margarine.