WST-1-based cytotoxicity assay of lawsone (LW) was performed on MCF7, Caco2, BJ and Keratinocyte cells and viabilities were found as over 90 % for all cells. Significant wound healing effect of LW was reported on Keratinocyte cells. Antibacterial and antifungal activities of LW were tested on seven microorganisms with three concentrations and 1,000 A mu g/disc of LW showed antibacterial effect on Bacillus subtilis. In vitro cell incorporation of radioiodinated LW (I-131-LW) was evaluated on same cells. Keratinocyte cells uptake were 5 times more. Consequently, I-131-LW was found usable for researches about especially skin diseases in addition to breast and intestinal cancer.