What Is Pea Protein? Pea Protein Isolate Powder is the vegan and vegetarian alternative to whey protein and is rich in muscle-building amino acids. This powder contains no animal products and is dairy and gluten-free. Our pea protein is sourced from the Pisum sativum species of pea. Pea Protein Benefits † Pea Protein Isolate Powder may support the muscles and aid muscle recovery after strenuous exercise.