Which beans have the highest source of protein?
                                
                                
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                                    4 min read                                
                            
                                According to nutrition data, soybeans contain approximately 31.3 grams of protein per cooked cup, making them the clear winner when it comes to finding which beans have the highest source of protein. While soybeans are the standout, many other beans offer significant protein, fiber, and nutrients for a healthy diet.