The Key Benefits of Brown Rice and Pea Protein Powder Brown rice and pea protein powders are popular for those following a plant-based diet or who need to avoid dairy products or animal sources of protein due to lactose intolerance or other adverse effects. Below, we take a look at these two types of protein powder in terms of their amino acid profiles and the amount of protein they provide. David Robinson, PhD UK Fitness ProFeb 6 · 12 min read