2. Materials and Methods

This is a clinical trial study. 40 students were randomly selected based on inclusion criteria and were divided into two groups of 20 people (control and intervention) by drawing. Inclusion criteria were: willingness to participate in the study, age> 19 years, no history of specific physical illness and mental health problems (acute or chronic), no use of supplements, no pregnancy, indigenousness, no history of smoking or substance abuse, non-use of any drug within two weeks before the start of research, no any medication within two weeks before the start of the study, no history of divorce or death of family members and a stressful event, and having a high score on anxiety in the Cattle’s anxiety questionnaire. On the other hand, the exclusion criteria were: unwillingness to continue participation, risk of physical and psychological problems during the study, and planning to become pregnant. For collecting data, a demographic form and Cattle’s anxiety questionnaire were used.