The air we normally breathe is 21% oxygen, 79% nitrogen and minor amounts of other gases. Daily stress, sun-rays, pollution, aging, all cause damage to the skin and body tissues at the cellular level causing depletion of essential amino acids, collagen and elastin which are all needed to keep the tissue healthy. During HBOT therapy, the pressure is increased to 2 – 3 times that of sea-level and you breathe pure oxygen. The breathing of pure oxygen under pressure causes a much larger than normal amount of oxygen to be dissolved in the blood and subsequently, the rest of the body. An increase in blood oxygen restores normal levels of blood gases and tissue function to promote healing and fight infection as injured or damaged cells begin to replicate themselves using the DNA to create new healthy cells.