Hemp vs Pea Protein Powder: Which One is Better?, lactose intolerance). Fortunately, there are numerous vegan protein powders that represent excellent sources of protein. Here, we focus on two plant-based protein sources—pea and hemp protein—and look at the scientific evidence on how much protein they provide, whether either is a complete protein source, and their potential health and fitness benefits. David Robinson, PhD UK Fitness ProFeb 20 · 19 min read