Discover what normal oxygen levels are, why they matter, and how to maintain them. Learn the signs of low oxygen , common causes, and natural ways to improve your oxygen levels . IntroductionBlood oxygen level in the human body refers to the concentration of oxygen dissolved or bound to hemoglobin in the bloodstream. It is typically measured as arterial oxygen saturation (SaO2) or oxygen saturation (SpO2), expressed as a percentage. SaO2 or SpO2 measurements provide valuable information about oxygen transport and delivery efficiency in the body . Maintaining a blood oxygen level of 75–100 mm Hg or 95–100% is vital for a healthy heart, brain, and kidneys. Most people don’t need to monitor their blood oxygen levels regularly.
