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There are different factors that play a role in the skin ageing process. We can differentiate mainly between intrinsic and extrinsic factors:
Intrinsic factors: the natural consequence of physiological changes over time. It is also known as chronoageing.
Extrinsic factors: might be controllable to varying degrees, including the sunlight (also known as photoaging), smoking, repetitive muscle movements (known as mechanical aging) and other lifestyle components that can affect the skin.