Association between breast-feeding exposure and duration with offspring's dietary patterns over 1 year of age: a systematic review of observational studies

Some evidence suggests that breast-feeding may modify food preferences in the later years of life. The present study aimed to provide a systematic review of observational studies investigating the association between exposure to breast milk and its duration with data-driven or hypothesis-driven (or diet quality scores) dietary patterns over 1 year of age. The databases of PubMed, Scopus and Web of Science were searched for observational studies published from January 2010 until July 2021, which led to the identification of twenty-two eligible articles. There was considerable heterogeneity between studies in terms of assessment of exposure and outcome. Of the eleven studies that assessed data-driven dietary patterns, ten reported a significant association for at least one identified dietary pattern. Overall, being breast-fed and a longer duration of any/exclusive breast-feeding were associated with higher scores on healthy dietary patterns characterised mainly by high loadings of fruits, vegetables and whole grains. In comparison, a negative association was found for unhealthy dietary patterns rich in foods with high content of added sugar, salt and saturated fats. In terms of diet quality scores, nine out of eleven studies reported a significant positive association between the duration of any breast-feeding and adherence to recommended healthy diets or dietary guidelines. In conclusion, the evidence from this review was generally in support of the hypothesis indicating breast-feeding is associated with healthy dietary patterns at later ages. However, due to the methodological limitations in the available studies, further research is warranted to elucidate solid evidence on this topic.

Automated summary

Some evidence suggests that breastfeeding may influence food preferences in later years. A systematic review of observational studies was conducted to investigate the association between breastfeeding exposure and duration with data-driven or hypothesis-driven dietary patterns after 1 year of age. The review found that breastfeeding and longer duration of breastfeeding were associated with higher scores on healthy dietary patterns, characterized by fruits, vegetables, and whole grains. On the other hand, there was a negative association with unhealthy dietary patterns rich in added sugar, salt, and saturated fats. The review also highlighted the need for further research to overcome methodological limitations and provide more solid evidence.