The researchers have since tested breast milk samples from another 20 or so women and are working on figuring out the exact identities of the bacteria - busting sugars. (sciencenews.org)
Other studies have revealed that 25 % of milk samples were delivered with poor packaging and were no longer frozen, and contamination with drugs and other substances. (sciencedaily.com)
It also varies between milk samples produced by the same woman at different points in time. (parentingscience.com)