11 Jan 2016 Blackmores Institute Zinc levels may predict breast feeding problems 11 Jan 2016 Share Share on LinkedIn Share on Facebook Share on Twitter Share on Google+ Share on Pinterest News Zinc levels in breast milk may be a useful indicator of optimal breast function during lactation, according to US-based researchers. Shannon L. Kelleher and colleagues from Penn State University in Pennsylvania, report that their data suggest that by identifying women with abnormally low levels of zinc in breast milk, they may be able to more quickly recognise mothers who might have trouble breast-feeding. × To continue reading this article, please Log In or Sign Up for access.