Intervention
The treatment and control groups received 500 mg ginger and placebo (corn) tablets thrice a day with main meals for 12 weeks, respectively. Each 500 mg ginger tablet was standardized to contain 25 mg gingerols. Ginger and placebo supplements were provided by Dineh Iran Industries Complex, Tehran, Iran. During the trial, both groups were asked to maintain their usual diet and physical activity and to avoid consuming ginger and other products containing it. In addition, possible side effects of the intervention were evaluated according to the trial protocol [