The environmental pollution, radiation, cigarette smoke and chemical and infectious agents increase the processes of cellular oxidation (oxidative stress), with the consequent free radical generation, which act directly on cells, damaging cell structures. This causes damaged cells to function improperly, triggering diseases and chronic degenerative processes. The foregoing we could deduce that premature ageing is the result of inadequate protection against damage caused by free radicals in tissues. Aging describes two intertwined processes: senescence and senility. Senescence to natural or physiological aging process is called. In senescence life is extinguished slowly and harmoniously, without traumatic deficit that the senile individual experiences.
Only changes that are present in all individuals who grow older, represent the aging per is. The rest is senility. We call it senility at the abnormal or pathological aging. Senility is an acceleration of normal biological processes of life. So it is important to distinguish between the physiological aging and senility (associated diseases). Is obvious that the wear of the existence as they have called some to the aging process, not manifests itself in the same way and at the same rate in each one of us, nor in all bodies alike.
From there the heterogeneous and individual nature of aging. Genetic variability, the lifestyle and the way of feeding us will influence our aging directly. From there we can observe 50 years notably young adults from the point of view physical and intellectual, while that other individuals of the same age will present signs of premature old age. With respect to the aging of the skin, it is noteworthy that signs classically associated with age, most have recently been linked more to a lack of care of the skin that age in itself. During the clinical assessment of skin from a patient, through physical examination, depending on the degree of hydration, elasticity, turgidity, pigmentation, the presence of wrinkles, etc, we get great notions value data, which allow us to differentiate clearly between a meticulous, a battered leather skin, as well as the presence of signs of aging.