Telomeres are the protective end caps of chromosomes and play a very important role in the aging process. As cells divide, telomeres shorten and individuals age, so telomere length can be used as a biomarker of aging or related diseases in the body. The presence of very short telomeres may lead to the onset of age-related diseases, then measuring telomere length information opens up a greater possibility of living a long and healthy life, and it also allows to assess whether some interventions such as medications, diet, and exercise can positively affect telomere length.