Is aging a disease? Traditionally, aging has been viewed as a natural process and consequently not a disease. This division may have, in part, originated as a way of establishing aging as an independent discipline of research. Some authors go as far as to create a division between intrinsic aging processes (termed primary aging) and diseases of old age (termed secondary aging). For example, photoaging, the accelerated deterioration of skin as a result of UV rays during one's lifetime, is considered by dermatologists as a condition leading to pathology. In contrast, chronological skin aging is accepted as the norm. As well as being seen as separate from disease, aging is looked at as a risk factor for developing disease.
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