Vegan protein is more expensive than whey protein made from real food before it's turned into powder. Whey is usually a waste product that's leftover from cheese making and would otherwise be disposed of. Also, because there are still more omnivores than vegans, there's a bigger demand for whey protein powder. It can therefore be made in bulk, which makes it cheaper to manufacture. Many omnivores and vegetarians assume that something marketed as vegan isn't for them. In reality, plant-based protein powder could be the best option for most people.