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This dissertation is concerned with the skin, the factors that contribute to its ageing and the methods of slowing down and treating it. The health and good appearance of the skin has rightly occupied people since antiquity until today, as it is the largest organ of the human body and it is the mirror which reflects every change that occurs in it. Over time, the changes that occur in the skin are due to endogenous factors that are inevitable because of the deterioration of the body and to exogenous ones that can be ‘reversible’ according to the particular behavior and attitude which we adopt in our everyday life. At this point, the science of aesthetics intervenes, trying with cosmetic preparations and treatments with modern machines, to prolong the youth of the skin and to help with the treatment of the problems of an already aged and damaged skin.