Interaction and competition for intestinal absorption by zinc, iron, copper, and manganese at the intestinal mucus layer.
Level 5 - mechanism / opinion, no new human data
Narrative review of mechanistic literature without systematic search or new human data
PubMed 38640745 · doi:10.1016/j.jtemb.2024.127459
What was done
The authors synthesized existing literature and identified knowledge gaps regarding physicochemical interactions between gastrointestinal mucins and the essential trace elements iron, zinc, manganese, and copper during intestinal absorption.
What was found
The abstract reports no numerical data, effect sizes, or quantitative findings. Conceptually, gastrointestinal mucins keep iron, zinc, manganese, and copper in a soluble state in the neutral to slightly alkaline intestinal environment, allowing subsequent uptake by enterocytes. Furthermore, available evidence indicates that competitive interactions among these trace elements begin directly at the mucus layer.
Why it matters
Identifying the mucus layer as an active site of mineral competition expands mechanistic models of trace element bioavailability beyond cellular transport proteins.
Limits
This is a narrative review containing no new primary experimental or human clinical data, systematic search criteria, or quantitative synthesis. Knowledge regarding competitive bioavailability at the mucus layer remains incomplete.
Cited by
- supports Copper and zinc compete with each other for gastrointestinal absorption.