In this study, we have demonstrated that hexavalent chromium is reduced by skin and chromium is bound to skin. The chemical findings were corroborated with tracer methods. The chromium bound to the skin was in the trivalent state, indicating a chemical reduction of the hexavalent species before binding.
SAMITZ MH, KATZ S. Preliminary Studies on the Reduction and Binding of Chromium With Skin. Arch Dermatol. 1963;88(6):816–819. doi:10.1001/archderm.1963.01590240140023