Some Symptoms of Oxygen deficiency may include the following.

Oxygen will heighten concentration, alertness and help fight off Depression.  Oxygen has been known to help with relaxation and sleep disorders, prevent disease, relieve hangovers, and Alleviate headaches. A human being can live weeks without food, days without water, but only minutes without oxygen. 

People have used aromatic botanical essences (essential oils) to enhance the surroundings as Well as promote health.  Today we can all experience the abundant and profound influence of essential oils on our lives. Essential oils when combined with oxygen stimulate the senses and begin to alter ones mood or condition in positive ways. Science is just now rediscovering the power of aromatherapy through essential oils, the lifeblood of the plant kingdom.

Health Practitioners contend that when essential oils are inhaled with oxygen the life force of the body is stimulated to conditions of Tranquility, harmony, invigoration and an overall feeling of being refreshed. The theory is that aroma signals the part of the Brain that control emotions. Research has shown specific smells produce physical effects within the body.