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HomeMost Popular NewsDoes Breastfeeding Affect the Child’s Body Composition as an Adolescent?

Does Breastfeeding Affect the Child’s Body Composition as an Adolescent?

A recently published prospective longitudinal study examined the effects of breastfeeding on later body composition in adolescents.

Obesity is on the rise among all age groups in Brazil.

Although body mass index (BMI) is the common measure to determine one’s obesity status, it does not account for the difference in fat mass and fat-free mass.

Factors that play a role in determining health outcomes in adulthood

Several studies have shown that factors in early life such as the amount of weight gained and being breastfed play a role in determining health outcomes in adulthood.

In a recent study in BMC Nutrition, researchers examined the effects of breastfeeding on adolescent body composition.

The study included data taken at 6 months old, 12 months old, 48 months old, and 18 years of age of adolescents born in 1993 in Pelotas, Brazil. A total of 1,438 births were included in the final study sample.

Researchers completed in-home visits to interview mothers on their breastfeeding habits, with a specific interest in how long the children breastfed for and when they began to consume other milk products or semisolid and solid foods.

The researchers were anticipating that longer and exclusive breastfeeding as infants would lead to higher fat-free mass indexes.

In addition to BMI, the researchers used other measures to evaluate weight status and body composition.

Fat-free mass index (FFMI) is a measure used to evaluate the amount of body mass that comes from muscle, internal organs, bones, water, and connective tissue. FMI measures the amount of body mass that comes from fat.

Nutritional Variables and Fat Mass Indexes

The average fat-free mass index of males in the study was 19.0 kg/m2 and the average fat mass index (FMI) was 4.0 kg/m2.

Among females, the average FMI and FFMI were 8.0 kg/m2 and 15.5 kg/m2 respectively. The results showed that fat-free mass indexes were associated with several socioeconomic and genetic variables.

FMI was higher in males from households with higher incomes and both FMI and FFMI were linked to the mother’s pre-pregnancy BMI.

The fat-free mass index was higher in females with mothers who smoked and FMI was high among females with low birth weight but low in those with mothers with dark skin. As with males, pre-pregnancy BMI was linked to FMI and FFMI.

FFMI was found to be linked to the duration of breastfeeding in males.

Furthermore, FFMI was higher in females who breastfed, versus those who did not breastfeed at all.

Along with FMI, FFMI was higher in females who started consuming semisolid and solid foods at four to five months old. The length of time spent breastfeeding and when the infant started consuming other milk ingredients were not linked to FMI in females.

In conclusion, for both males and females, breastfeeding had a significant effect on body composition in later life.

Results of the study

The results showed that breastfeeding as an infant was associated with fat mass indexes during later adolescence, for both males and females.

The link between semisolid and solid food introduction and body composition, however, was exclusive to females.

One major benefit of the study was that it examined body composition in adolescents, rather than in children as most studies have done.

A limitation of the study was that researchers did not examine which specific semisolid and solid foods were consumed. Still, this study is beneficial as it provides more insight into the effects of early nutritional exposures on adult health and disease.

Written by Monica Naatey-Ahumah, BSc

Reference: Orlandi, S.P., González-Chica, D.A., Buffarini, R., Gonzalez, M.C., Menezes, A.M.B., Barros, F.C., and Assunção, M.C.F. (2017). Breastfeeding and complementary feeding associated with body composition in 18– 19 years old adolescents in the 1993 Pelotas Birth Cohort. BMC Nutrition, 3(84). https://doi.org/10.1186/s40795-017-0201-z.

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