Recent research says that consuming whole grain barley regulates blood sugar to a great extent. The health benefits of barley are mostly attributable to the eight essential amino acids which it contains, meaning that it represents a complete protein in our diet. The vitamin C content in barley is almost twice than that of oranges. This vitamin particularly strengthens your immune system and reduces the chances of cold and flu. Iron improves the blood volume and prevents anemia and fatigue. It aids in proper kidney functioning and the development of body cells. Furthermore, barley contains copper, which forms hemoglobin and red blood cells.