IRCT201408295623N26 IRCT 2014-09-05 Arak University of Medical Sciences Effect of zinc in treatment of gestational diabetes Effect of zinc supplementation on insulin resistance and lipid profiles in women with gestational diabetes 2014-08-04 anticipated 58 Complete https://irct.ir/trial/6056 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Randomization description: At study baseline after balanced blocked randomisation, participants will be allocated into two treatment groups to take either zinc supplements (n = 29) or placebo (n = 29). Randomization will be done by the use of Stat Trek software. Participants, investigators or the assessors of the outcomes are also unaware of the study groups, Blinding description: Randomization and allocation will be concealed from the researchers and participants until the final analyses are completed. Another person at the Clinic who is not involved in the trial and not aware of random sequences will allocate the numbered bottles of capsules to participants. Supplements and placebo are in the same packaging at the pharmaceutical company. Only the code is written on the packages. Patients and researcher do not know the type of drug and after analyzing the data, packet codes are decoded. 3 Gestational diabetes. Intervention 1: Intervention group: Zinc capsule (Donyayeh Behesht Pharmaceutical Company, Tehran, Iran), 30 mg, once a day for 6 weeks orally. Intervention 2: Control group: Placebo capsule (Barij Essence Pharmaceutical Company, Kashan, Iran), once a day for 6 weeks 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.