What Are the Normal Oxygen Levels for Adults and Kids?

What are the normal oxygen levels for adults and kids?

Normal blood oxygen levels in healthy adults range from 95%-100%. Levels may be slightly lower during periods of inactivity or in smokers. Under 90% may be considered as hypoxic.

Normal blood oxygen levels in healthy kids are considered to be at least 97%. This percentage is also considered to be a borderline to normal and it means that even 97% of bloodstream must be oxygen saturated.

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