Impact of Bariatric Surgery on Breast Milk Composition: What You Need to Know

Impact of Bariatric Surgery on Breast Milk Composition: A Belgian Study

Introduction to Bariatric Surgery

In Belgium, researchers conducted a study to investigate the composition of breast milk in women who have undergone bariatric surgery and how maternal diet influences this composition. Bariatric surgery, a procedure aimed at weight loss, involves various methods to reduce stomach size and may include gastric bypass surgery, which reroutes the small intestine.

Concerns Regarding Nutritional Deficiencies

While bariatric surgery is effective for individuals with obesity, there are concerns about potential nutrient deficiencies due to the reduced stomach capacity. This raises questions about how these deficiencies might affect breast milk composition and the nutritional status of breastfeeding infants.

Study Overview

A multi-center prospective study published in the Journal of Nutrition analyzed breast milk samples from 86 participants across two Belgian hospitals over two years. The researchers focused on the macronutrient content and vitamin A concentration in the breast milk, collecting samples from the third day after delivery until the sixth week of lactation. Participants included 24 normal-weight women, 39 overweight women, 12 obese women, and 11 women who had undergone bariatric surgery, all aged between 29 and 39.

Findings on Breast Milk Composition

The study revealed that women who had undergone bariatric surgery produced breast milk with higher levels of fat, milk energy, and carbohydrates during the first two weeks compared to their normal-weight, overweight, and obese counterparts. Although initial protein and vitamin A levels were lower, these improved to normal levels in the following week. Overall, all macronutrients in the breast milk of women post-bariatric surgery exceeded those of the other groups.

Influence of Maternal Diet

Interestingly, the mothers’ diets did not significantly affect the changes in breast milk composition, suggesting that dietary choices may impact micronutrients rather than macronutrients.

Conclusions and Recommendations

This research challenges the prevailing notion that bariatric surgery could lead to lower macronutrient levels in breast milk, which might compromise infant nutrition. The findings indicate that women who have undergone bariatric surgery can provide breast milk rich in essential macronutrients and vitamin A in the first six weeks postpartum, irrespective of their diet. Therefore, it is advisable to encourage breastfeeding among these women to ensure that their newborns receive the benefits of breast milk.

Although the study had a limited sample size and duration, the researchers employed appropriate methodologies for their analysis. Given the rarity of obtaining such prospective samples, their recommendations are considered valid.

References

Jans G, Devlieger R, De Preter V, Ameye L, Roelens K, Lannoo M et al. Bariatric Surgery Does Not Appear to Affect Women’s Breast-Milk Composition. The Journal of Nutrition. 2018.