This report describes the serial morphologic changes observed in peroral mucosal biopsies of the small intestine obtained before and after vitamin B 12 replacement from 8 patients with previously ...

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, ...

Vitamin B12, an essential water-soluble vitamin, is very important for the production of red blood cells, synthesis of DNA, and normal neurological function. However, its absorption in the body is ...

These vitamins and minerals work as a team to promote your health. Reviewed by Dietitian Maria Laura Haddad-Garcia Some nutrients work better together—pairing them boosts how well your body absorbs ...

RECENT evidence suggests that protein synthesis is necessary before vitamin D can affect Ca transport in the intestine. Thus the vitamin D-stimulated absorption of Ca is inhibited by actinomycin D ...

A researcher at Midwestern University led a new study showing that Western diets, high in fat and simple sugar, promote the growth of bacteria in the small intestine that increase fat digestion and ...

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, ...

MANY animal tissues contain specific protein-like substances that combine with vitamin B 12. The availability of the vitamin in this bound form when given by mouth to animals depends on the origin of ...

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 ...

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 ...