Ferr Phos First Aid spray by Schuessler Tissue Salts, help temporarily relieve minor inflammation, redness and the first stage of minor respiratory ailments. Ferr Phos also plays a role in the creation of energy in the cells. It gives strength and toughness to the circular walls of blood vessels especially the arteriesFurthermore, Ferr Phos (Iron Phosphate) is known as the First aid remedy and is found in red blood cells. It is regarded as the oxygen carrier. The more oxygen the cells receive, the more nutrients they can burn and the more energy they can release.