Phenyllactate

ChemistryAlso known as: Phenyllactic acidN/A

Detects the presence of phenyllactate in serum or plasma, a phenylalanine metabolite.

Normal Range

Consult your provider

N/A

Abnormal Levels

Consult your provider

Specimen Type

Blood

Why This Biomarker Matters

Elevated phenyllactate indicates disordered phenylalanine metabolism, including possible PKU. Early detection and dietary management prevent neurological damage and intellectual disability.

Overview

Phenyllactate is an organic acid produced during phenylalanine metabolism. Its presence in urine suggests impaired phenylalanine breakdown, possibly indicating phenylketonuria (PKU) or related disorders. While PKU is typically identified through newborn screening, this test may detect missed cases or atypical variants in older children or adults. Elevated phenyllactate can be associated with neurological problems and developmental delays if the underlying amino acid disorder is unmanaged. Positive results require specialist evaluation.