Carbon Dioxide (Bicarbonate)

also known as CO2

NORMAL_RANGE
23 – 29 mEq/L
UNIT
mEq/L

/WHAT_IT_IS

CO2 (mostly bicarbonate) reflects acid-base status. Useful for detecting metabolic acidosis or alkalosis.

/NORMAL_RANGE

Reference: 23–29 mEq/L.

What does high CO2 mean?

  • +Metabolic alkalosis, COPD.

What does low CO2 mean?

  • +Metabolic acidosis, hyperventilation.

/ON_TRT

Not affected by TRT.

/RELATED

/TRACK_THIS

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Last reviewed: 2026-06-04 · MyTRT does not provide medical advice. Always consult your physician.