Cortisol Clearance Rate (CCR) is a ratio on the DUTCH test that reflects how fast your body is clearing and metabolizing cortisol.

  • Higher CCR (fast clearance): More metabolites compared to free cortisol/cortisone → your body is clearing cortisol quickly.

  • Lower CCR (slow clearance): Fewer metabolites compared to free cortisol/cortisone → your body is clearing cortisol more slowly.

Why this test matters

  • Context for symptoms: A fast CCR can make free cortisol look low even when production is high, while a slow CCR can leave more free cortisol circulating, sometimes feeling like “high cortisol.” Both patterns can affect energy, sleep, mood, weight, and stress resilience.

  • Actionable insight: CCR integrates free and metabolized cortisol data to give a fuller picture of HPA axis activity and liver/kidney metabolism than free cortisol alone.

  • Treatment guidance: Knowing whether cortisol clearance is fast or slow helps clinicians tailor next steps, such as supporting thyroid or liver function, adjusting sleep/stress timing, or considering further testing.

How the CCR is calculated

DUTCH displays CCR as a slider/ratio:

  • High ratio = fast clearance (metabolites high compared to free cortisol).

  • Low ratio = slow clearance (metabolites low compared to free cortisol).
    Each report has its own interpretation bands (slow ↔ fast). Always use the range from your report.

How to understand your CCR result

  • Fast CCR (high ratio): Cortisol is cleared quickly, free cortisol may look flat/low. Contributors can include higher metabolic rate, larger body size/BMI, and increased reductase enzyme activity.

  • Slow CCR (low ratio): Cortisol is cleared slowly, so free cortisol may run higher. Common contributors include low thyroid function and reduced liver metabolism.

  • Balanced CCR (mid-range): Free and metabolized values align, and emphasis shifts to daily rhythm (e.g., morning surge, nighttime decline) and symptom context.

Factors that affect your CCR

  • Thyroid function: Hypothyroidism can slow CCR; correcting thyroid often normalizes clearance.

  • Liver & kidney metabolism: Enzyme activity (5α/5β-reductase) directly influences clearance speed.

  • Body size & BMI: Higher BMI is often linked to faster cortisol clearance patterns.

  • Medications & stimulants: Caffeine, alcohol, certain drugs, or chronic sleep loss may shift CCR.

  • Collection & testing method: DUTCH uses validated dried urine assays; results are platform-specific—compare only within the same lab.

Related markers to read with CCR

  • 24-hour Free Cortisol / Cortisone: Reflect daily available cortisol and circadian curve.

  • Metabolized Cortisol (THF + THE): Indicates total cortisol processed through liver and kidney.

  • Cortisol Awakening Response (CAR): Adds timing context by measuring the morning cortisol surge.

How to use your CCR result

  • Don’t interpret CCR alone—always check it alongside free cortisol, metabolized cortisol, and CAR.

  • Map CCR patterns to your symptoms (e.g., “low cortisol” fatigue may actually be fast clearance, while “wired-tired” insomnia may link to slow clearance).

  • Discuss thyroid health, liver/kidney function, BMI, stimulant use, sleep quality, and medications with your clinician if CCR is very high or low.

  • Re-test on the same platform after treatment changes to track trends instead of relying on a single result.

FAQs

Is CCR the same as metabolized cortisol?
No. Metabolized cortisol is part of the CCR equation. CCR is a ratio comparing metabolites to free cortisol/cortisone, reflecting clearance speed.

Can a fast CCR make my free cortisol look low?
Yes. Clearance can be so quick that free cortisol appears low, even when total production is robust.

What does a slow CCR mean?
It suggests cortisol is clearing more slowly, often linked to thyroid or liver function issues, and can leave free cortisol running higher.

Is dried urine accurate for this testing?
Yes. When collected properly, dried urine is validated for measuring cortisol and its metabolites. Always follow collection instructions carefully.

What does it mean if your Cortisol Clearance Rate (CCR) result is too high?

An elevated Cortisol Clearance Rate (CCR) ratio indicates that your body is metabolizing and clearing cortisol more quickly than average. In this pattern, cortisol is rapidly processed by the liver and kidneys into metabolites (THF + THE), so lab results may show higher metabolized cortisol alongside lower free cortisol levels. This means total cortisol production can be robust, yet the amount of active, circulating free cortisol available to your tissues may look “low” or flat.

Clinically, a fast CCR can help explain why someone with “low cortisol” on tests still produces a normal or high overall output. Contributing factors may include a higher metabolic rate, larger body size/BMI, increased reductase enzyme activity, chronic stress load, or certain lifestyle influences such as stimulant use.

While not harmful on its own, an elevated CCR can influence how your body feels and responds—for example, you may experience low energy, poor stress resilience, difficulty maintaining stable sleep, or slower recovery despite adequate hormone production. This makes CCR a valuable context marker: it distinguishes between true underproduction of cortisol and fast clearance that simply lowers circulating levels.

For the most accurate picture, CCR should always be interpreted alongside free cortisol, metabolized cortisol, daily rhythm (CAR), and clinical context. If clearance is unusually fast, your clinician might explore thyroid health, metabolic function, lifestyle factors, or nutrient/liver support to help optimize balance.

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What does it mean if your Cortisol Clearance Rate (CCR) result is too low?

low Cortisol Clearance Rate (CCR) ratio indicates that your body is clearing cortisol more slowly than average. In this pattern, fewer cortisol metabolites are produced relative to the levels of free cortisol and cortisone measured over the day. As a result, free cortisol remains higher in the bloodstream for longer, which can “feel” like high cortisol exposure to your tissues—even when total hormone output is normal or moderately increased.

Slow clearance can be influenced by several factors, including low thyroid function, reduced liver or kidney metabolism, lower enzyme activity, certain medications, or metabolic conditions that affect hormone breakdown. Clinically, a low CCR is often seen in people with hypothyroidism or sluggish metabolic processing.

Experiencing slow cortisol clearance can contribute to symptoms such as insomnia, feeling “wired but tired,” anxiety, irritability, weight gain, or persistent stress sensitivity. It’s important to note that high free cortisol resulting from slow clearance might not reflect excessive hormone production, but rather prolonged circulation due to reduced breakdown.

Because CCR is just one piece of the hormonal puzzle, results should be interpreted in combination with your full DUTCH report, related markers (like free and metabolized cortisol), and clinical guidance. If CCR is low, clinicians often review thyroid health, liver function, medication effects, and lifestyle habits to help support healthy cortisol metabolism and achieve better symptom control.

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