Description of the urine analysis:

The Urinary Free Cortisol (UFC) test, performed using High-Performance Liquid Chromatography (HPLC), is the “gold standard” for measuring biologically active cortisol. While most cortisol in the blood is bound to proteins, only the “free” portion is filtered by the kidneys and excreted. Unlike standard assays, the HPLC method physically separates cortisol from other similar steroids and medications, providing a highly specific measurement. This analysis captures the total output of active cortisol over a full 24-hour cycle, making it superior to single blood draws for identifying chronic overproduction of the hormone.

What does the analysis represent?

• Goal: To quantify the total 24-hour excretion of biologically active (free) cortisol with maximum chemical specificity.
• Primary Application: Screening for Cushing’s syndrome (hypercortisolism) and distinguishing between true hormonal disorders and “pseudo-Cushing” states.
• Method: HPLC (High-Performance Liquid Chromatography), which eliminates cross-reactivity with other steroids or drugs.

Recommendations for the Test (General)

• Time: Requires a precise 24-hour urine collection. Discard the first morning void, then collect every drop of urine for the next 24 hours, including the final void at the 24-hour mark.
• Hygiene: Thorough external cleansing is necessary before each void to prevent sample contamination.
• Collection: Use a specialized large-volume container. The specimen must be kept refrigerated (+2°C to +8°C) throughout the entire collection period to maintain the stability of the hormone.
• Specific Rules: Avoid excessive caffeine and alcohol during the collection, as these can trigger temporary cortisol spikes.

What can affect the results?

• Factors altering levels: Severe emotional or physical stress; high fluid intake (excessive dilution); use of topical, inhaled, or systemic corticosteroids; pregnancy; and chronic alcoholism (which can mimic high cortisol levels).

When to take the test?

• Recommendations: If you exhibit physical signs of cortisol excess, such as a “moon-shaped” face, a fatty hump between the shoulders, central obesity with thin limbs, or purple skin striae (stretch marks).
• Preparation: Consult your physician regarding the temporary suspension of any steroid-based medications (including inhalers or skin creams) that could interfere with the results.

How to interpret the results?

The evaluation of UFC-HPLC results is an advanced clinical task performed exclusively by your endocrinologist. Because the HPLC method is so precise, it removes the “noise” of other substances, but the result still requires expert correlation with your 24-hour urine volume (diuresis). Your doctor must determine if an elevated result is due to a primary tumor (in the pituitary or adrenal glands) or a secondary response to chronic stress or depression. This high-level synthesis ensures that diagnostic decisions are based on the true hormonal output of your body, rather than transient fluctuations.

Possible further investigations

• Late-Night Salivary Cortisol: To see if the natural drop in evening cortisol is missing.
• Low-Dose Dexamethasone Suppression Test: To evaluate the body’s feedback control system.
• Plasma ACTH: To locate the source of the excess (brain vs. adrenal glands).
• CT or MRI Imaging: To visualize the adrenal glands or the pituitary gland.
• Consultation with an Endocrinologist.

When does the next step make sense?

If the HPLC method confirms a pathologically high level of free cortisol, the next step is typically localized imaging and suppression testing. Identifying the exact cause of cortisol excess is vital for preventing the long-term complications of hypertension, bone loss, and metabolic dysfunction.

👉 If necessary, you can discuss the results of the analysis with a specialist, such as an endocrinologist (Doctors – TAMC).