Related Experiment Videos
[Zinc in natural and artificial milk]
Annali Sclavo; Rivista Di Microbiologia E Di Immunologia
|November 1, 1975
Summary
Zinc content and its binding differs significantly between unprocessed milk and infant formula. Unprocessed milk has higher zinc levels bound to casein and immunoglobulins, unlike milk powders where zinc is less available.
Area of Science:
- Nutritional Biochemistry
- Dairy Science
Context:
- Infant nutrition relies heavily on milk-based preparations.
- Understanding zinc bioavailability in infant diets is crucial for development.
Purpose:
- To compare the quantitative and qualitative zinc content in natural milk sources versus milk powder preparations.
- To investigate the binding forms of zinc in different milk matrices.
Summary:
- Natural milk (human and cow) and colostrum contain higher zinc concentrations than milk powders.
- In natural milk, zinc is primarily casein-dependent and found in immunoglobulin fractions.
- Milk powders exhibit lower zinc levels, predominantly free or protein-independent, with minimal immunoglobulin-bound zinc.
Impact:
- Highlights potential differences in zinc bioavailability between natural milk and infant formulas.
- Suggests that processing may alter the form and availability of essential minerals like zinc.
- Informs nutritional strategies for infant feeding and the formulation of infant foods.