The skin is one of the largest organs of the human body and among its functions, the most important is the one of barrier protection against external agents. Despite the anatomical point of view the skin is similar in all individuals, there are some important variables related to race, gender and age, to be considered in the selection and purchase of cosmetics.
Fundamental in order to optimize the effect of the cosmetic is to choose the right one depending on the biotype; the skin can in fact be classified, depending on the characteristics, in thin or fine, oily or meaty, thick, normal or mixed.
Thin or fine: constitutionally pale, appears whitish and slightly darkens the sun and can present the spillage; is generally hydrated, but suffers from lack of sebum.

Fat or fleshy: quite thick and characterized by a compact dermis and inelastic; unfortunately often iperseborroica and especially on the nose, forehead and chin looks shiny on the surface.

Thick: it appears dehydrated, rough, inelastic and dull color; can also be  greasy bacause sebaceous orifices occur dilated and is also fragile because of poor hydrophilic components; easily tends to harden and shrivel to dehydration.

Normal: luminous, velvety and smooth complexion for a smooth operation of the sebaceous and sweat glands.

Mixed: generally the most common type among the various types of skin is usually oily on the critical areas of the nose, forehead and chin, while it is normal in the other part of the face.

How to recognize the type of skin? With the touch of your fingers you can make a first cursory examination to determine the thickness and texture. You can perform an initial assessment of the oiliness by applying absorbent paper on clean makeup and dust face after a few hours from cleansing to ensure the restoration of normal secretions. A normal skin is lightly greased in the critical areas of the nose, chin and forehead and much poorer sebum at the center and the outside of the cheeks and on the neck. An oily skin stain the paper even in areas generally poor sebum. With the help of a magnifying glass you can instead highlight the fine cracks of a dry and dehydrated skin that scraped lightly with fingernails can lift a thin veil of “dandruff”; in oily skin you can get to notice the sebaceous pores rich of sebum and thus dilated. There are then accurate instrumental examinations, such as ph monitoring, impedance measurement, analysis with light wood, etc. which allow a more precise classification of biotype.

Recognize the type of skin and blemishes linked to it is the basis for the selection of the most suitable cosmetic and therefore more effective one for each individual.
Deborah Subissati.