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There is seems to be a new emphasis on tracking blood oxygen levels now that smart watches can read this metric right from our wrists or from your finger tip using a pulse oximeter. So why are blood oxygen levels so important? Using a pulse oximeter, the blood oxygen level metric (Sp02) places a numerical value on the amount of oxygen that is circulating in our blood. Oxygen is important for our bodies to function. Oxygen enters our bodies via the mouth and nose then into our lungs and …