Pea proteins are not only packed with muscle building proteins and healthy fibers, but are also packed full of a number of other important nutrients that you might not be aware of. Pea protein contains very high levels of arginine compared to other protein sources and is also high in BCAA content. Compared to whey products, pea protein has nearly the same BCAA level, while most other veggie proteins fall short. It has a higher leucine content than both Egg White and Beef Protein Isolate—Leucine is one of the 3 BCAAs and is known for its function in stimulating skeletal muscle protein synthesis.