October Cover story for the Journal of American Dietetic Association:
Article: Breastfeeding and Infant Weight
Research Design: Random cluster of 420 children aged 6 months to 10 years from the Northern Mariana Islands were measured during one time period. Children measured for height and weight and trained researchers asked caregivers about past feeding habits.
Sample at a Glance: 73% of children were ever breastfed; 53% still breastfed at 6 months and 22% at 1 year. 5% of children underweight, 15% at risk for overweight and 19% were overweight.
Link of Overweight to Breastfeeding: Children who had been breastfed had a substantially lower body mass index compared with children who had not been breastfed, after controlling for age, sex, birth weight and years of mother’s education. The duration of breastfeeding or breastfeeding exclusively did not impact the effect.
Limitations of this research: Study didn’t follow children over time; children were not racially diverse (does not apply to general population); had a limited snapshot of additional social, behavioral and environmental factors in the lives of these children.
Future Research Questions: How does breastfeeding help lower BMI - what are the mechanisms?
Bottom Line: This research study and additional research has shown that breastfeeding may be one of the factors positively associated with a lower BMI (leaner) children.