One of the original “Solaray Products” – an Sp Herb Blend containing key herbs and specially selected homeopathic cell salts formulated for specific health benefits – Respiration Blend Sp-3 is formulated to help support healthy respiratory function and easy breathing.a blend of eleven powerful herbs that contain plant compounds like cardenolides, flavonoids, saponins, diterpenes, and more may help support healthy lung function, soothe the respiratory tract, and promote clear and calm breathing. We ve also included cell salt nutrients designed to work synergistically with the herbs in our Respiration Blend.