Protein is vital for numerous biological processes, including growth, tissue repair, immunity support and maintenance of metabolic health. With the increasing adoption of plant-based and vegan diets, there is a growing demand for alternative protein sources to meet nutritional requirements. Whey protein powder is a popular protein supplement. However, its compatibility with veganism remains in question. This article delves into the origins of whey protein, its congruence with vegan dietary practices, and potential vegan protein alternatives from a scientific standpoint.