IRCT201601045623N65 IRCT 2016-01-04 Vice chancellor for research, Kashan University of Medical Sciences Effect of supplementation in treatment of women with cervical intraepithelial neoplasia 2 and 3 Clinical trial of the effect of vitamin D supplementation compared with the placebo on recurrence and metabolic profiles in women with cervical intraepithelial neoplasia 2 and 3 2015-12-22 anticipated 58 Complete https://irct.ir/trial/6095 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Other design features: Randomization and allocation will be concealed from the researchers and participants until the final analyses are completed. Another person at the Oncology Clinic at the Kashan University of Medical Sciences, who is not involved in the trial and not aware of random sequences, will be assigned the participants to the numbered bottles of capsules, Randomization description: t study baseline and after stratification for pre-intervention BMI and age, subjects will be randomly divided into two groups to take either vitamin D supplements (n = 29) or placebo (n = 29). Randomization will be done by the use of computer-generated random numbers, Blinding description: Randomization and allocation will be concealed from the researchers and participants until the final analyses are completed. Another person at the Oncology Clinic at the Kashan University of Medical Sciences, who is not involved in the trial and not aware of random sequences, will be assigned the participants to the numbered bottles of capsules. 3 Cervical intraepithelial neoplasia 2 and 3. Intervention 1: Intervention group: Vitamin D supplement, 50000 IU, every 2 weeks, for 6 months orally. Intervention 2: Control group: Placebo, every 2 weeks, for 6 months orally. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is Undecided - It is not yet known if there will be a plan to make this available.