It's a double-blind, controlled study that is done in two stages. The first stage involved 600 depressed patients referred to the clinic of Yazd Khatamolanbiya. To verify serum magnesium levels in depressed persons. For this purpose we will select persons aged 20-60 years and don't suffer from disorders and such as diseases kidney, liver, heart, thyroid, bleeding disorders, and malignancies, degenerative disease and don't take dietary supplements and antidepressants and diuretics in recent 3 months. And didn't happen events include loss of job, divorce, death of close relatives' family members, and they happened to be in the past 3 months. Beck Depression questionnaire will be completed. Then those whose scores were between 18-35 ml of blood have taken and will be analyzed by the central laboratory of Yazd. Then, between them, 60 patients with hypomagnesaemia ( serum magnesium less than 75 / 0 mmol per liter ) will select and with random codes are divided into two groups .the intervention group give 2magnesiu moxide tablets daily for 8 weeks and the control group give 2plasebo tablets for 8 weeks. People who are don't take Over 20% of medication during study or have started taking supplements or change in the type and dose of their medicines may have to be excluded of this study. After 12 weeks of intervention, serum magnesium Beck will be measured in both groups for the extent complementary. After 12 weeks of intervention, serum magnesium will be measured in both groups to assess the effect of a dietary supplement.