Amount of Lactose Causing Symptoms in People With Lactose Intolerance and Ulcerative Colitis

2014-08-27 03:41:25 | BioPortfolio


The hypothesis underlying this study is that failure to recognise the role of lactose intolerance among patients with ulcerative colitis has led to inappropriate dietary advice and treatment with drugs that contain lactose as a filler. These failures exacerbate symptoms and lead to the unnecessary use of immune suppressant drugs.

There is disagreement amongst researchers regarding the amount of lactose needed to cause symptoms in those who are lactose intolerance. The general consensus is that the amount of lactose in a glass of milk (12 grams) is enough to cause mild symptoms in most patients who are lactose intolerant (1). However, there have been a number of studies and case studies that argue that much lower amounts can cause symptoms (2, 3, 4, 5). This could be as little as 0.02 grams (6).

Ulcerative colitis is a chronic relapsing inflammatory disease of the colon and rectum, characterised by recurrent episodes of abdominal pain and profuse diarrhoea. The prevalence of lactose intolerance in patients with ulcerative colitis is not greater than in the general population, but there is no evidence as to whether these patients are more sensitive to lactose.

This study will identify the threshold at which symptoms of lactose intolerance develop in those who have both lactose intolerance and ulcerative colitis, to provide appropriate advice and treatment in the management of patients with these conditions.

Study Design

Observational Model: Case-Crossover, Time Perspective: Prospective


Lactose Intolerance


Lactose in water


Leicester General Hospital
United Kingdom




University Hospitals, Leicester

Results (where available)

View Results


Published on BioPortfolio: 2014-08-27T03:41:25-0400

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Medical and Biotech [MESH] Definitions

The condition resulting from the absence or deficiency of LACTASE in the MUCOSA cells of the GASTROINTESTINAL TRACT, and the inability to break down LACTOSE in milk for ABSORPTION. Bacterial fermentation of the unabsorbed lactose leads to symptoms that range from a mild indigestion (DYSPEPSIA) to severe DIARRHEA. Lactose intolerance may be an inborn error or acquired.

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The multifunctional protein that contains two enzyme domains. The first domain (EC hydrolyzes glycosyl-N-acylsphingosine to a sugar and N-acylsphingosine. The second domain (EC hydrolyzes LACTOSE and is found in the intestinal brush border membrane. Loss of activity for this enzyme in humans results in LACTOSE INTOLERANCE.

A measure of a patient's ability to break down lactose.

Plasmids which determine the ability of a bacterium to ferment lactose.

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