What does the Ochratoxin A, Urine test measure?

Why is Ochratoxin A, Urine measured?

Ochratoxin A is the most frequently detected mycotoxin in urinary mycotoxin panels in North American and European populations, reflecting its widespread presence in both the food supply and water-damaged building environments. In functional medicine, elevated urinary OTA is associated with chronic fatigue, immune suppression, renal tubular dysfunction, and neurotoxic symptoms in patients with significant exposure. Urinary OTA detection confirms recent metabolic processing — not necessarily active ongoing exposure — and must be interpreted alongside exposure history (diet, water-damaged building contact) and clinical presentation. Mainstream nephrology and toxicology guidelines do not establish urinary OTA clinical action thresholds; clinical decision thresholds used in functional medicine are proprietary to individual laboratory reference frameworks.

Reference ranges

Standard reference

# REVIEWER FLAG: Confirm Mosaic Diagnostics reference range for urinary Ochratoxin A — values are proprietary to Mosaic's population dataset and not standardised across laboratories or regulatory agencies. Confirm whether Mosaic reports raw concentration (ppb), creatinine-corrected values (ng/g creatinine), or both.

Functional medicine optimal

# REVIEWER FLAG: Confirm Mosaic Diagnostics' clinical interpretive zones for OTA — optimal, borderline, and elevated tiers as defined in their MycoTOX interpretive guide.

Units

ppb (µg/L), ng/g creatinine

Reference ranges vary by laboratory and assay platform. Interpret in context of the issuing laboratory's stated range.