This web site highlights the findings of a research study, later published in International Breastfeeding Journal, that compares the nutrient levels in breastmilk or formula in various baby bottles. Titled “Comparative Analysis of Retinol, Ascorbic Acid, and Alpha-Tocopherol in Baby Milk Using Varied Delivery Systems,” the study was designed to investigate changes in nutrient levels that might occur during a typical bottle feeding time of 20 minutes, using both expressed human milk and infant formula, in both vented bottles and unvented bottles. The study looked at the amount of nutrients in the milk when delivered through seven commonly used baby bottles, including Dr. Brown’s® – which fared the best at preserving key nutrients.
See complete publication at: Francis, J., Rogers, K., Brewer, P. et al. Comparative analysis of ascorbic acid in human milk and infant formula using various milk delivery systems. Int Breastfeed J 3, 19 (2008). https://doi.org/10.1186/1746-4358-3-19