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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.
The free radical theory of aging states that organisms age because cells accumulate free radical damage over time. [1] A free radical is any atom or molecule that has a single unpaired electron in an outer shell. [2] While a few free radicals such as melanin are not chemically reactive, most biologically relevant free radicals are highly ...
The formula contains hydrating oils to calm aging, overly sensitive skin exposed to retinol, while the sun protection ingredients shield your skin from UV radiation damage. $41 at Sephora Explore ...
The anti-aging movement is a social movement devoted to eliminating or reversing aging, or reducing the effects of it. [1] [2] A substantial portion of the attention of the movement is on the possibilities for life extension, but there is also interest in techniques such as cosmetic surgery which ameliorate the effects of aging rather than delay or defeat it.
Blood tests showed a reduction in biological age of up to 11 years in five of the six women, with the average participant experiencing a 4.6-year decrease, according to the study, published last ...
Aging is characterized by a progressive loss of physiological integrity, leading to impaired function and increased vulnerability to death. The hallmarks of aging are the types of biochemical changes that occur in all organisms that experience biological aging and lead to a progressive loss of physiological integrity, impaired function and, eventually, death.
Senescence refers to the process of physiological change in individual members of a species as they age. [9] [12] An antagonistically pleiotropic gene can be selected for if it has beneficial effects in early life while manifesting its negative effects in later life because genes tend to have larger impacts on fitness in an organism's prime than in their old age. [13]
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