Self-reported milk intolerance in irritable bowel syndrome: what should we believe?

Inverse Dose Effect of Pretest Dietary Lactose Intake on Breath Hydrogen Results and Symptoms in Lactase Nonpersistent Subjects

“…Surprisingly, 59% of BH 2 -negative patients complained of some symptoms, albeit less severe than BH 2 -positive patients. These results reflect findings by other workers who found the relationship between reports of lactose intolerance and objective confirmation to be unreliable (27,28).…”

Irritable bowel syndrome and chronic fatigue 3 years after acute giardiasis: historic cohort study

“…Post-infectious complications after giardiasis are rarely described, the only exception being lactose intolerance, which has been poorly characterised 1. Lactose intolerance does not seem to play a role in the development of post-infectious IBS after bacterial gastroenteritis,31 nor does subjective milk intolerance predict lactose intolerance in patients with IBS 32. In this study the majority of patients with IBS did not report subjective milk intolerance, and there was no correlation between previous Giardia infection and subjective milk intolerance in patients with IBS.…”

Diagnóstico de intolerancia a la lactosa en adultos: rendimiento comparativo de la clínica, test de hidrógeno espirado y test genético

“…La frecuencia de IL en esta muestra de pacientes sintomáticos (52,5%) resultó muy similar al 56% esperado para población hispánica (mestiza) chilena escasa utilidad para seleccionar pacientes con NPL y MAL, como ha sido repetidamente reportado en la literatura 15,18,19 . En la práctica clínica habitual los síntomas asociados a la ingesta de leche pueden atribuirse a NPL, a TDF o a una mezcla de ambos.…”