Complete Vegetarian Protein Sources Pea Protein · Brown Rice Protein · Hemp Protein · Golden Chlorella · Chia Non GMO - Non Genetically Modified Source of Dietary Fiber Protein Supplement VeganJarrow Formulas Optimal Plant Proteins is a vegan source of proteins and fibers. Pea protein, organic brown rice protein, organic hemp protein, golden chlorella, and chia combine to supply a complete plant-based amino acid profile along with natural fibers. Metabolin is a supernatant powder (a special blend of cell wall components and metabolites derived from the fermentation of beneficial bacteria, including Lactobacillus and Propionibacterium species.)