Saliva has been used for many years as a biological fluid for the detection of different biomarkers such as electrolytes, hormones, drugs and antibodies. It offers advantages for clinicians, patients and researchers in terms of convenience and it is non-invasive and painless to collect.Saliva has been used for many years as a biological fluid for the detection of different biomarkers such as electrolytes, hormones, drugs and antibodies. It offers advantages for clinicians, patients and researche...