Infant feeding practices

Area of Science:

• Infant nutrition
• Pediatric dietetics
• Renal physiology

Background:

• Understanding infant nutrient intake is crucial for growth and development.
• The introduction of solid foods alongside milk or formula impacts overall diet.
• Assessing renal function in infants is important for monitoring health.

Purpose of the Study:

• To determine nutrient intakes in infants based on feeding methods.
• To evaluate the impact of feeding regimens on infant renal concentrating capacity.
• To analyze the contribution of milk and solid foods to infant nutrient intake.

Main Methods:

• Dietary record/recall method used for 39 infants at 2, 4, 8, and 12 weeks.
• Infants categorized into formula-only, formula with solids, human milk-only, and human milk with solids groups.
• Plasma osmolality, sodium, and urea measured at 4 and 8 weeks to assess renal function.

Main Results:

• Milk was the primary source of energy and 10 of 13 nutrients across all ages.
• Solid foods appeared to replace, rather than supplement, milk/formula on a caloric basis.
• Feeding methods did not affect plasma osmolality or sodium levels, despite differing renal solute loads.
• Plasma urea levels correlated positively with protein intake at 8 weeks.

Conclusions:

• Milk is fundamental for infant nutrition, even with early solid food introduction.
• Solid foods may displace caloric intake from milk, necessitating careful dietary planning.
• Infant feeding practices studied did not compromise hydration status as indicated by plasma markers.
• Monitoring protein intake is relevant for infant renal solute load, particularly concerning plasma urea levels.