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Table 1 Diagnostic cut-off for lactose malabsorption based on literature

From: Evaluation of breath, plasma, and urinary markers of lactose malabsorption to diagnose lactase non-persistence following lactose or milk ingestion

Measure

Cut-off for lactose malabsorption1

Breath H2

≥20 ppm

Plasma glucose

≤1.11 mmol/L

Urinary galactose/creatinine ratio

≤0.10 mg/mg

  1. Cut-off values are based on validated methods for maximal increase in breath H2 [23,24,25] and plasma glucose [12, 26] over baseline and urinary galactose/creatinine ratio [28] at 180 min, following ingestion of 50 g of lactose
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BMC Gastroenterology

ISSN: 1471-230X

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