Objectives Exposure to cadmium (Cd), which causes environmental and industrial pollution, causes toxicity in many tissues and organs, especially bone, lung and kidney. Hormones, growth factors and other stimuli act on bone tissue through osteoblasts. In this study, it was aimed to determine the effects of Cd on hFOB1.19 osteoblast cells and the protective and healing potentials of estrogen, androgen and vitamin D against the inhibitory effect of Cd on the proliferation. Methods hFOB1.19 cells were cultivated in our laboratory using Dulbecco’s Modified Eagle’s Medium-F12, HEPES medium, containing 10% fetal bovine serum, 1% penicillin/streptomycin in 34.5 °C 5%CO2 incubator. To determine its protective potentials for the toxicity of CdCl 2 , it was previously applied 1,25(OH) 2D vitamin, 17 β -estradiol, and 5 α -androstane for 72 h to cells. To determine their curative potential, osteoblast cells, which were previously exposed to CdCl 2 for 72 h, were administered 1,25(OH) 2D vitamin, 17 β -estradiol, and 5 α -androstane. Following these applications were determined proliferation by XTT analysis and, the amounts of androgen receptor, estrogen receptor, vitamin D receptor, alkaline phosphatase, osteocalcin and osteoprotegerin by ELISA analysis. Results Vitamin D has been both preventive and curative effective to increase cell proliferation, which Cd reduces. Interestingly, estrogen had a preventive effect and androgen had a curative effect. Conclusions In addition to showing the negative effects of cadmium on the proliferation of osteoblast cells, this study provides an overview of the effects of hormone and vitamin D applications before and after Cd, and these results may serve as a guide for future studies.