Creatine kinase (CK): what your result means.

A muscle enzyme; elevated levels indicate muscle damage or excessive exertion. Creatine kinase (CK) is measured by blood test as part of the Organ panel in the HodieLabs Health Blueprint.

Why Creatine kinase (CK) matters

Useful in performance users. Interpret using the reporting lab’s reference interval and clinical context; trend over time is often more informative than a single value.

Associated risks when out of range: Elevated CK indicates muscle damage, from exercise, rhabdomyolysis, myopathy, or cardiac events. Very high CK (>10× upper limit) with dark urine suggests rhabdomyolysis requiring urgent management.

Evidence basis

The HodieLabs Evidence-Based Clinical Library classifies Creatine kinase (CK) as an strong evidence-tier biomarker. Its reference ranges come from a published authority standard rather than from observational optimisation targets. The standard used here is RCPA Australian pathology reference intervals; CK 30–200 U/L (male) / 25–170 U/L (female). Exercise-adjusted: recent vigorous exercise can transiently elevate CK. Where relevant clinical outcomes are noted on this page, they reflect the guideline literature referenced below.

Evidence-based reference ranges

The HodieLabs Evidence-Based Clinical Library interprets Creatine kinase (CK) against published clinical authority standards, never arbitrary "optimal" ranges. Measured in U/L:

Clinical interpretation

• Useful in performance users.
• Interpret using the reporting lab’s reference interval and clinical context; trend over time is often more informative than a single value.

What improves it: the evidence-based levers

• Adjust training load
• Clinical review if very high

Recommended testing frequency: Annual, as part of a comprehensive panel. Single markers are always interpreted in context.

How Creatine kinase (CK) testing works at HodieLabs

Creatine kinase (CK) is measured in every Health Blueprint at our Melbourne Preventative Health & Longevity Clinic, interpreted by a doctor against the guideline-cited ranges above and tracked over time through your HodieLabs membership.

References

1. RCPA Australian pathology reference intervals; CK 30–200 U/L (male) / 25–170 U/L (female). Exercise-adjusted: recent vigorous exercise can transiently elevate CK.

This page is general information from the HodieLabs Evidence-Based Clinical Library, not medical advice. Speak with your GP about what testing and care is appropriate for you.