Genetic Carbohydrate Maldigestion as a Model to Study Food Hypersensitivity

Stool and saliva samples collection

"Questionnaire on;~* demographic, ethnicity, IBS subtype, post-infection onset, previous surgeries~* IBS severity score for adults~* Hospital Anxiety and Depression scores for adults~* Somatization score for adults~* Total glucose and fructose and excess fructose, lactose, sorbitol, mannitol, oligosaccharides (Fructans and GOS) as measured by CNAQ questionnaire for adults and children~* Quality of Life as measured by the PedsQL™ GI Symptoms Module~* GI symptoms as measured by the PedsQL™ GI Symptoms Module~* Anxiety, Depression as measured by the Pediatric PROMIS®"