Gerontology is the science that studies the process of aging and the psychological, biological, and social changes that it encompasses throughout different stages of life. Gerontology is a multidisciplinary science, as it retrieves information from a broad scope of study, including psychology, social and political sciences, biology, and physiology. Gerontology involves the comprehensive study of all aspects of aging, ranging from the study of the cellular changes implicated in maturing to the impact of aging on different social contexts, which justifies the existence of multiple gerontology sub-fields that function simultaneously. The most common subfields are social gerontology, environmental gerontology and biogerontology.

Understanding aging processes and their consequences on an individual and social level is extremely relevant as it helps identify the aging population's social and medical needs and develop ways to satisfy them better, therefore improving general well-being and creating better living conditions.

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