Best whey-protein powders Best collagen-protein powder Best plant-based protein powders All the other protein powders I’ve tried Protein powders can be found in thousands of formulations on tens ...

Whey protein and pea protein are both sources of high-quality complete protein. But they differ in taste, source, digestibility, nutrition and muscle building.

That’s because the most popular kinds of protein powder — including whey, pea and soy protein — come from plants or are byproducts of food processing, which cuts down on their carbon emissions.