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2. Intrinsic and extrinsic ageing - Wikipedia

   en.wikipedia.org/wiki/Intrinsic_and_extrinsic_ageing

   Intrinsic ageing and extrinsic ageing are terms used to describe cutaneous ageing of the skin and other parts of the integumentary system, which while having epidermal concomitants, seems to primarily involve the dermis. [1] Intrinsic ageing is influenced by internal physiological factors alone, and extrinsic ageing by many external factors.

3. Photoaging - Wikipedia

   en.wikipedia.org/wiki/Photoaging

   This process can result from both intrinsic (i.e., genetically determined) as well as extrinsic processes (i.e., environmental factors). Photoaging is attributed to continuous, long-term exposure to ultraviolet (UV) radiation of approximately 300–400 nm, either natural or synthetic, on an intrinsically aged skin.

4. 6 surprising factors that can accelerate the aging of your skin

   www.aol.com/lifestyle/2017-01-23-6-surprising...

   "Approximately 30 percent of how you age is genetically determined, which means you have a great deal of control over how your skin looks over time..." 6 surprising factors that can accelerate the ...

5. Wrinkle - Wikipedia

   en.wikipedia.org/wiki/Wrinkle

   Age wrinkling in the skin is promoted by habitual facial expressions, aging, sun damage, smoking, poor hydration, and various other factors. [4] In humans, it can also be prevented to some degree by avoiding excessive solar exposure and through diet (in particular through consumption of carotenoids , tocopherols and flavonoids , vitamins (A, C ...

6. Top dermatologists share 6 sneaky signs that your skin is ...

   www.aol.com/article/lifestyle/2016/09/19/top...

   According the experts, there are a few lesser-known and more subtle signs of skin aging that are good to know about. Skip to main content. Lifestyle. 24/7 help. For premium support please call: ...

7. Senescence - Wikipedia

   en.wikipedia.org/wiki/Senescence

   Environmental factors may affect aging – for example, overexposure to ultraviolet radiation accelerates skin aging. Different parts of the body may age at different rates and distinctly, including the brain, the cardiovascular system, and muscle. Similarly, functions may distinctly decline with aging, including movement control and memory ...

8. Collagen loss - Wikipedia

   en.wikipedia.org/wiki/Collagen_loss

   Aging skin is characterized by wrinkles, loss of skin flexibility, laxity, and having a rough appearance in the skin texture. Prevalent throughout the body, loss of collagen can also contribute to numerous other disorders such as joint pain , weakened hair and nails , reduced bone density , gastrointestinal issues , and reduced muscle mass .

9. Free-radical theory of aging - Wikipedia

   en.wikipedia.org/wiki/Free-radical_theory_of_aging

   Brewer proposed a theory which integrates the free radical theory of aging with the insulin signalling effects in aging. [36] Brewer's theory suggests "sedentary behaviour associated with age triggers an oxidized redox shift and impaired mitochondrial function". [36] This mitochondrial impairment leads to more sedentary behaviour and ...