Study on Breast Milk Nutrients Among Different Diets

Overview of the Study

A recent study investigated the breast milk of mothers who consume meat, follow a vegetarian diet, or adhere to a vegan lifestyle. The research also assessed vitamin B12 supplementation and its levels in breast milk. For vegetarian and vegan mothers, ensuring adequate nutrient intake is crucial, especially during breastfeeding, as they must also provide essential nutrients to their infants.

Importance of Vitamin B12

Vitamin B12 plays a vital role in brain and nerve development. For those following vegetarian or vegan diets, this nutrient can only be obtained through fortified foods or dietary supplements. Previous studies in the United States indicated that breastfeeding women in these dietary groups often have low levels of vitamin B12 in their milk. This nutrient’s significance is underscored by the German Nutrition Society’s recommendation against a vegan diet for individuals who are still growing, including pregnant and breastfeeding women.

Rationale for New Research

Due to inconsistencies in earlier studies, U.S. researchers conducted a new investigation to compare the breast milk of mothers with different dietary patterns. The study aimed to evaluate the impact of vitamin B12 supplementation and its levels in breast milk, with findings published in the American Journal of Clinical Nutrition.

Study Participants and Methodology

The research included data from 74 women, with a balanced representation of those consuming meat, following vegetarian diets, and adhering to vegan diets. Approximately 78% of the participants reported taking vitamin B12 supplements in various forms, including multivitamins, prenatal vitamins, B-complex vitamins, and individual vitamin B12.

Key Findings

The study found no significant differences in vitamin B12 levels in breast milk among women with varying diets. This contrasts with previous findings, which may be attributed to earlier studies not accounting for vegan women taking vitamin B12 supplements. Notably, nearly 20% of the participants exhibited low vitamin B12 levels in their breast milk.

Vegan Women and Vitamin B12 Supplementation

Vegan mothers who took individual vitamin B12 supplements demonstrated higher concentrations of this nutrient in their breast milk. Conversely, women consuming multivitamins were more likely to have lower levels of vitamin B12. The researchers concluded that vegan women taking individual vitamin B12 supplements do not face disadvantages compared to non-vegetarian counterparts regarding breast milk vitamin B12 content.

Future Research Directions

The study’s authors emphasize the need for further research to establish acceptable vitamin B12 levels in breast milk and to determine the best dietary sources or supplements for achieving these levels. Additionally, there is a call to define acceptable vitamin B12 levels for infants.

Reference

Pawlak R, Vos P, Shahab-Ferdows S, Hampel D, Allen LH, Perrin MT. Vitamin B-12 content in breast milk of vegan, vegetarian, and nonvegetarian lactating women in the United States. Am J Clin Nutr. 2018. doi:10.1093/ajcn/nqy104.

Written by Nicola Cribb, VetMB DVSc Dip.ACVS.