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Patients with renal disease may have falsely low 5-HIAA levels in the urine. [7] 5-HIAA is increased in untreated patients with malabsorption, who have increased urinary tryptophan metabolites. Such patients include those with celiac disease, tropical sprue, Whipple disease, stasis syndrome, and cystic fibrosis.
Because of the major implications of a diagnosis of coeliac disease, professional guidelines recommend that a positive blood test is still followed by an endoscopy/gastroscopy and biopsy. A negative serology test may still be followed by a recommendation for endoscopy and duodenal biopsy if clinical suspicion remains high. [21] [42] [94]
] Detox diets are often high in fiber. Proponents claim that this causes the body to burn accumulated stored fats, releasing fat-stored "toxins" into the blood, which can then be eliminated through the blood, skin, urine, feces and breath. Proponents claim that things such as an altered body-odor support the notion that detox diets have an effect.
Today, with serological testing (determination of coeliac disease-specific antibodies in the blood) and duodenal biopsy with histological testing being available for diagnosing coeliac disease, patients with suspected coeliac disease are strongly advised to undergo both serological and biopsy testing before undertaking a gluten-free diet. [7]
Celiac disease affects ~1% of the population in most parts of the world. [3] Ninety to one hundred percent of patients with coeliac disease have inherited genes at the HLA-DQ locus that encode HLA-DQ2 and/or HLA-DQ8 serotype proteins. [12] About 2–3% of individuals who inherit these HLA-DQ2 and/or HLA-DQ8 serotypes develop coeliac disease. [10]
Chronic fatigue associated with GSE is a systemic disorder, however there are neurological components that are especially manifest in blood deficiencies like avitaminosis, amineralosis and anemia. Reduced iron and the lack of vitamins folate, B 6 , B 12 and malabsorption of essential fatty acids can cause depression and chronic fatigue. [ 91 ]
Quantitative fecal fat tests measure and report an amount of fat. This is usually done over a period of three days, the patient collecting all of their feces into a container. The container is thoroughly mixed to homogenize the feces, without using specific mixer equipment. A small sample from the feces is collected.
Celiac Sprue Association/United States of America is a member-based nonprofit organization dedicated to helping individuals with celiac disease and dermatitis herpetiformis worldwide through education, research, and support. It has information for its members on following a gluten-free diet.