Impossible burger is vegan. It is entirely made of plant-based ingredients. The ingredients of Impossible burger are soy protein concentrate, water, coconut oil, sunflower oil, 2 percentage or less of Methylcellulose, Potato protein, Cultured dextrose, soy Leghemoglobin, soy protein isolate, salt, Zinc Gluconate, Thiamine Hydrochloride, Pyridoxine, Niacin, Riboflavin, Sodium Ascorbate, vitamin B12 and mixed Tocopherols.
 
Impossible Burger has confirmed that their burger is vegan but has admitted that it has used animal testing to test the safety of leghemoglobin.
 
For any food item to be declared vegan, it should not have any animal products. Meat, fish,eggs, milk, honey, gelatin, and more animal products do not suit a vegan diet. Impossible Burger tastes like beef and the food scientists at Impossible Foods claim that the burger can be used as a substitute for ground beef in meat recipes.