Martin Pleasance Tissue Salts Ferr Phos First Aid 125T. Ferr Phos is known as the First aid remedy. It is found especially 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. Iron Phosphate-Ferr Phos 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 arteries. We must always remember that freely circulating oxygen rich blood is essential to health and life. Tissue Salts are micro doses of minerals that help rectify mineral imbalances which may be the cause of many common ailments. Tissue Salts may assist the absorption of nutrients from food and supplements.