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High protein intake from meat as complementary food increases growth but not adiposity in breastfed infants: a randomized trial

Tang, Minghua; Krebs, Nancy F.

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PMID: 25332329 PMCID: PMC4196483


BACKGROUND: High intake of cow-milk protein in formula-fed infants is associated with higher weight gain and increased adiposity, which have led to recommendations to limit protein intake in later infancy. The impact of protein from meats for breastfed infants during complementary feeding may be different. OBJECTIVE: We examined the effect of protein from meat as complementary foods on growth and metabolic profiles of breastfed infants. DESIGN: This was a secondary analysis from a trial in which exclusively breastfed infants (5-6 mo old from the Denver, CO, metro area) were randomly assigned to receive commercially available pureed meats (Meat group; n = 14) or infant cereal (Cereal group; n = 28) as their primary complementary feedings for ∼ 5 mo. Anthropometric measures and diet records were collected monthly from 5 to 9 mo of age; intakes from complementary feeding and breast milk were assessed at 9 mo of age. RESULTS: The Meat group had significantly higher protein intake, whereas energy, carbohydrate, and fat intakes from complementary feeding did not differ by group over time. At 9 mo of age, mean (± SEM) intakes of total (complementary feeding plus breast milk) protein were 2.9 ± 0.6 and 1.4 ± 0.4 g · kg(-1) · d(-1), ∼ 17% and ∼ 9% of daily energy intake, for Meat and Cereal groups, respectively (P < 0.001). From 5 to 9 mo of age, the weight-for-age z score (WAZ) and length-for-age z score (LAZ) increased in the Meat group (ΔWAZ: 0.24 ± 0.19; ΔLAZ: 0.14 ± 0.12) and decreased in the Cereal group (ΔWAZ: -0.07 ± 0.17; ΔLAZ: -0.27 ± 0.24) (P-group by time

Automatic Tags

Female; Humans; Male; Adiposity; Infant; Triglycerides; Energy Intake; Biomarkers; Body Weight; Weight Gain; Insulin; Insulin-Like Growth Factor I; Blood Glucose; Linear Models; Leptin; Cholesterol, HDL; Dietary Proteins; Diet Records; Child Development; Meat; Breast Feeding; Infant Nutritional Physiological Phenomena; Interleukin-6; Infant Formula; Tumor Necrosis Factor-alpha; Milk, Human

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