This will impede the body s ability to absorb oxygen and we slowly suffocate or our life span shortens. As our cells grow older they lose their ability to carry oxygen. As the liver ages it robs increasing amounts of oxygen reserves for detoxification often leaving the other body systems with an oxygen shortage. When needed, the cells send signals to send more oxygen. Our brains need it most so when the body is in short supply our brains suffer the consequences.
Oxygen causes oxidation which is the converting of nutrients into energy.
This oxidation also helps eliminate toxins and waste. The greatest threat to oxygen intake is the deterioration our breathing system. Next comes our exercise and nutrition, and then the environment. Of course if you are in a highly toxic present time breathing environment you will want to make it a priority above all others. Junk foods deplete oxygen stores.