The hyperbaric chamber benefits the body and brain by infusing them with increased levels of oxygen at increased pressure saturating the blood and tissues at the cellular level helping the body to heal. Blood plasma becomes saturated and carries oxygen to hypoxic tissues. Benefits include:
Typically a bit over an hour.
Number and frequency of treatments needed will vary with the specific condition. For many conditions it is 30-40 hours. For more Biohacking applications - recovery, cognition etc, 20 hours is a typical target. And ideally you can get your treatments as consecutively as possible.