Skin aging is a complex, progressive and irreversible biological process. It is conditioned by the individual genetic factors (approximately 25%), as well as nutritional and environmental factors.
It involves a number of changes affecting the epidermal cell turnover, the thickness of the dermis, the operation of the sebaceous and sweat glands, thermoregulation, immune response and a large set of processes at cellular level.

External signs
The most important visible signs are wrinkles and dryness.
With aging and external factors, the skin becomes dry because it loses its natural lipids and the surface skin barrier degrades preventing moisture retention. The skin is perceived as tight and rough.
In cases of extreme dryness, skin may experience discomfort such as itching or a scaly look, becoming cracked especially in flexing areas during motion.
