A clinical trial was set to demonstrate the effect of zinc salt on the local & general condition of burned patients. One Hundred cases were selected with long standing burn with generalized weakness and features of zinc deficiency and delayed burn healing. They were divided into two groups. Group one received zinc salt. Group two received placebo. Those treated with zinc showed good improvement both in local and general condition, although 10 patients showed no improvement but these patients need a lot more than zinc to improve. From this trial, zinc is recommended as an efficient adjuvant in the treatment of all long-standing burn cases