Helps with fighting infections. A fully oxygenated body is better able to eradicate anaerobic (“living without air”) bacteria, and will also enhance the effectiveness of some antibiotics.
Oxygenates ischemic tissue. Breathing oxygen under pressure dissolves O2 into blood plasma which carries it to every tissue and organ, which means parts of the body that have a compromised blood (and thus oxygen) flow get sufficient oxygen.
Promotes “off gassing”. By breathing 100% oxygen under pressure, toxic gases like carbon monoxide are forced out of the blood stream which greatly reduces the damage done by them.