Frederickson, Christopher, Fleming, David, Asael, Dan, Zaman, Mukhtiar, Ferguson, Randal, Kaiser, Michaela G, Rankin, Bryn D, Schenkels, Kassia M M, Hess, Andrew I T et al (2023) Single hair analysis by x-ray fluorescence spectrometry detects small changes in dietary zinc intake: A nested randomized controlled trial. Frontiers in Nutrition-Clinical Nutrition, 10 .