AIM To determine dynamic thiol/disulphide homeostasis in celiac disease and to examine the associate with celiac autoantibodies and gluten-free diet.METHODS Seventy three patients with celiac disease and 73 healthy volunteers were enrolled in the study. In both groups, thiol/disulphide homeostasis was examined with a new colorimetric method recently developed by Erel and Neselioglu. RESULTS In patients with celiac disease, native thiol(P = 0.027) and total thiol(P = 0.031) levels were lower, while disulphide(P < 0.001) level, disulphide/native thiol(P < 0.001) and disulphide/total thiol(P < 0.001) ratios were higher compared to the control group. In patients who do not comply with a gluten-free diet, disulphide/native thiol ratio was found higher compared to the patients who comply with the diet(P < 0.001). In patients withany autoantibody-positive, disulphide/native thiol ratio was observed higher compared to the patients with autoantibody-negative(P < 0.05). It is found that there is a negative correlation between celiac autoantibodies, and native thiol, total thiol levels and native thiol/total thiol ratio, while a positive correlation is observed between disulphide, disulphide/native thiol and disulphide/total thiol levels.CONCLUSION This study is first in the literature which found that the patients with celiac disease the dynamic thiol/disulphide balance shifts through disulphide form compared to the control group. AIM To determine dynamic thiol / disulphide homeostasis in celiac disease and to examine the associate with celiac autoantibodies and gluten-free diet. METHODS Seventy three patients with celiac disease and 73 healthy volunteers were enrolled in the study. In both groups, thiol / disulphide homeostasis was examined with a new colorimetric method recently developed by Erel and Neselioglu. RESULTS In patients with celiac disease, native thiol (P = 0.027) and total thiol (P = 0.031) levels were lower, while disulphide / native thiol (P <0.001) and disulphide / total thiol (P <0.001) ratios were higher than to the control group. In patients who do not comply with a gluten-free diet, disulphide / native thiol ratio was found higher compared to the patients who comply with the diet (P <0.001). In patients withany autoantibody-positive, disulphide / native thiol ratio was observed higher than the patients with autoantibody-negative (P <0.05). It is found that there is is a negative correlation between celiac autoantibodies, and native thiol, total thiol levels and native thiol / total thiol ratio, while a positive correlation is observed between disulphide, disulphide / native thiol and disulphide / total thiol levels. CONCLUSION This study is first in the literature which found that the patients with celiac disease the dynamic thiol / disulphide balance compared to the control group.