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Growth, body composition and breast milk intake of Swedish infants during early life
Insights
Breast milk intake in infants correlates with weight and fat gain, suggesting energy, not protein, limits early growth. Infant fat stores are linked to breast milk consumption.
Area of Science:
- Pediatrics
- Infant Nutrition
- Human Physiology
Background:
- Early infant growth and body composition are critical indicators of health.
- Breast milk is the primary nutrition source for many infants globally.
- Understanding factors influencing infant growth is essential for public health.
Purpose of the Study:
- To analyze the relationship between breast milk intake and growth parameters in healthy Swedish infants.
- To assess body composition, including fat and lean tissue, in relation to nutrient intake.
- To determine if energy or protein intake is the primary limiter of early infant growth.
Main Methods:
- Longitudinal study of 22 healthy, exclusively breastfed Swedish infants over the first 10 weeks of life.
- Anthropometric measurements were used to estimate body composition (body fat, lean body tissue).
- Correlation analysis was performed between breast milk intake, weight, length, and body composition changes.
Main Results:
- Infant growth and breast milk intake were comparable to established healthy breastfed populations.
- Breast milk intake showed a significant positive correlation with weight gain and fat gain.
- No significant correlation was found between breast milk intake and lean body tissue gain or length gain.
Conclusions:
- Energy intake, rather than protein, appears to be the limiting factor for growth in this cohort of breastfed infants.
- Infants possess a high capacity for fat retention during early life.
- The extent of fat stores in infants is directly related to their breast milk intake.
Abstract:
The growth and breast milk intake of 22 healthy completely breast fed Swedish infants (9 girls, 13 boys) during the first 10 wk of life are reported and were found to be similar to those of other healthy breast fed populations of infants. Also the body composition (body fat and lean body tissue) was estimated by an anthropometric method at the age of about 10 and 65 days. It was found that the breast milk intake correlated significantly with weight and fat gain but not with gain in lean body tissue or with gain in length. These findings suggest that energy rather than protein intake limited growth in this group of infants. Also the results confirm the fact that the capacity for fat retention is high during early life and show that the size of fat stores is related to breast milk intake.