Carbon Dioxide (CO2)
Serum CO2 on a basic metabolic panel mostly reflects bicarbonate, the major buffer maintaining blood acid-base balance. Low values suggest metabolic acidosis from diabetic ketoacidosis, lactic acidosis, kidney failure, or diarrhea, while high values indicate metabolic alkalosis from vomiting, diuretics, or respiratory compensation. It is interpreted with chloride, anion gap, and pH.
19 of 22 providers
Electrolytes &Minerals
23-29 mEq/L
What is Carbon Dioxide (CO2)?
Serum CO2 on a basic metabolic panel mostly reflects bicarbonate, the major buffer maintaining blood acid-base balance. Low values suggest metabolic acidosis from diabetic ketoacidosis, lactic acidosis, kidney failure, or diarrhea, while high values indicate metabolic alkalosis from vomiting, diuretics, or respiratory compensation. It is interpreted with chloride, anion gap, and pH.
Why It Matters
Reflects acid-base balance. Low levels indicate metabolic acidosis;high levels suggest respiratory problems or metabolic alkalosis.
Which Providers Test Carbon Dioxide (CO2)?
Full Provider Comparison
| Provider | Includes | Annual Cost | Biomarkers |
|---|---|---|---|
 Superpower | ✓ | $199 | 100+ (150 with ratios) |
 WHOOP Advanced Labs | ✓ | $349 | 65 |
 Labcorp OnDemand | ✓ | $398 | 40+ |
| ✓ | $486 | 40+ | |
| ✓ | $449 | 288 | |
| ✓ | $349 | 100+ | |
| — | $829 | 54 | |
 Function Health | ✓ | $365 | 160+ |
| ✓ | $250 | 65 | |
| ✓ | $495 | 80+ | |
| ✓ | $895 | 100+ | |
| ✓ | $1950 | 130+ | |
| ✓ | $375 | 95+ | |
| — | $Varies | 75+ | |
| ✓ | $190 | 100+ | |
| ✓ | $99 | 50 | |
| — | $124 | 60 | |
| ✓ | $349 | 130+ | |
| ✓ | $349 | 80+ | |
| ✓ | $375 | 85 | |
| ✓ | $700 | 128 | |
| ✓ | $99 | 100+ |
Frequently Asked Questions
What is Carbon Dioxide (CO2)?
Serum CO2 on a basic metabolic panel mostly reflects bicarbonate, the major buffer maintaining blood acid-base balance. Low values suggest metabolic acidosis from diabetic ketoacidosis, lactic acidosis, kidney failure, or diarrhea, while high values indicate metabolic alkalosis from vomiting, diuretics, or respiratory compensation. It is interpreted with chloride, anion gap, and pH.
What is the optimal range for Carbon Dioxide (CO2)?
The standard reference range for Carbon Dioxide (CO2) is 23-29 mEq/L. Optimal ranges may differ based on individual health goals and expert recommendations.
Which blood test providers include Carbon Dioxide (CO2)?
19 out of 22 blood testing providers include Carbon Dioxide (CO2) in their panels. This biomarker is widely available across major providers.
What category does Carbon Dioxide (CO2) fall under?
Carbon Dioxide (CO2) is categorized under Electrolytes &Minerals. This category includes biomarkers that help assess related aspects of health and wellness.
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Medical Disclaimer
This information is for educational purposes only and is not medical advice. Always consult with a qualified healthcare provider about your specific health needs.
Last reviewed:2026-04-12