Clinical evaluation of the 14C fat absorption test

Area of Science:

• Gastroenterology
• Nutritional Science
• Biochemistry

Background:

• Fat malabsorption is a common clinical challenge.
• Differentiating causes of steatorrhoea is crucial for effective treatment.
• Radiolabeled tracers offer a sensitive method for assessing nutrient absorption.

Purpose of the Study:

• To evaluate the absorption of glyceryl tripalmitate and palmitic acid in patients.
• To correlate breath CO2 specific activity with fecal fat excretion.
• To differentiate between pancreatic steatorrhoea and coeliac disease based on fat absorption patterns.

Main Methods:

• Oral administration of (14)C-labelled glyceryl tripalmitate to 62 patients.
• Measurement of maximum specific activity of breath CO2 post-dose.
• Subsequent testing of (14)C-labelled palmitic acid absorption in 54 patients.
• Correlation analysis between breath test results and fecal fat excretion.

Main Results:

• A significant correlation was observed between glyceryl tripalmitate absorption and fecal fat excretion.
• Pancreatic steatorrhoea showed impaired glyceryl tripalmitate absorption but normal palmitic acid absorption.
• Coeliac disease patients exhibited similarly depressed absorption for both glyceryl tripalmitate and palmitic acid.

Conclusions:

• Breath analysis of (14)C-labelled glyceryl tripalmitate is a valid indicator of fat absorption.
• Differential absorption patterns can help distinguish pancreatic steatorrhoea from coeliac disease.
• This method aids in diagnosing and understanding fat malabsorption disorders.