To study absorption, two different approaches have been used. In vivo methods, such as measuring the disappearance of a test substance from the gut, its appearance in body fluids or its fecal output, ...

Biopharmaceuticals, medium- and high-molecular weight biologically active macromolecules, are not easily absorbed by the small intestine, the main organ responsible for gastrointestinal absorption, ...

A new study -- one of a few to concentrate on microbes in the upper gastrointestinal tract -- shows how the typical calorie-dense western diet can induce expansion of microbes that promote the ...

This story is part of a series exploring human anatomy and physiology complexities. Each story in this collection showcases discoveries reshaping our understanding of the body's inner workings, ...

A new permeable peptide has been identified in the small intestine, which can help in absorption of biopharmaceutical products (like drugs) in the digestive tract, reveals a new study Kumamoto ...

Although the vast majority of research on the gut microbiome has focused on bacteria in the large intestine, a new study--one of a few to concentrate on microbes in the upper gastrointestinal ...