[Copper in nutrition man: absorption and bioavailability]

Area of Science:

• Biochemistry
• Human Physiology
• Nutritional Science

Context:

• Copper is an essential trace element vital for numerous physiological processes.
• Understanding copper bioavailability is key to preventing deficiencies and toxicities.
• Dietary factors significantly influence copper absorption and utilization.

Purpose:

• To investigate the intestinal absorption pathways of copper.
• To trace the transport of copper in the blood and its uptake by hepatocytes.
• To examine the role of enterohepatic circulation and dietary components in copper homeostasis.

Summary:

• Utilized stable isotopes (65Cu, 63Cu) in animal models and human volunteers to study copper absorption and transport.
• Identified key steps in copper's journey from the gastrointestinal tract to the bloodstream and liver cells.
• Highlighted the regulatory roles of enterohepatic circulation, bile secretion, and various dietary factors (proteins, amino acids, fructose, ascorbic acid, phytates, divalent cations) in maintaining copper nutritional status.

Impact:

• Provides a comprehensive understanding of copper bioavailability mechanisms.
• Informs dietary recommendations for optimizing copper intake and preventing related health issues.
• Contributes to the scientific basis for managing copper-related metabolic disorders.