What does the Fumonisins B1, B2, Urine test measure?

Why is Fumonisins B1, B2, Urine measured?

Urinary fumonisin detection reflects recent dietary exposure from maize-based foods — cornmeal, polenta, tortillas, corn chips, corn cereals, popcorn, and corn-fed animal products are the primary dietary sources. In functional medicine assessments, elevated fumonisin exposure is associated with impaired sphingolipid metabolism affecting membrane function and is considered a contributing factor in populations with high corn-based dietary patterns. Geographic and dietary context is the primary interpretive framework — populations with high corn staple intake in fumonisin-endemic regions carry meaningfully higher cumulative exposure risk. In Western populations with moderate corn intake, urinary fumonisin detection is more likely to reflect recent dietary exposure than pathological accumulation.

Reference ranges

Standard reference

# REVIEWER FLAG: Confirm Mosaic Diagnostics reference range for urinary fumonisins — fumonisin urinary detection reflects recent dietary exposure and reference values are proprietary to Mosaic's dataset.

Functional medicine optimal

# REVIEWER FLAG: Confirm Mosaic Diagnostics' interpretive zones for urinary fumonisins.

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.