Interactions between human milk nutrients appear important in predicting infant cognition, and there may be a benefit to specific nutrient combinations.
Link to Publication: http://www.ncbi.nlm.nih.gov/pubmed/26540073
Cheatham CL and Sheppard KW. Synergistic Effects of Human Milk Nutrients in the Support of Infant Recognition Memory: An Observational Study. Nutrients 2015, 7, 9079–9095; doi:10.3390/nu7115452.