It is common practice to make no distinction between hair and scalp. In fact, the hair and the scalp have completely different structures and functions and should therefore be treated differently. It is scientifically proven that over time the anomalies present in the scalp affect healthy hair growth. Simple flaking of the skin or oily or dry seborrheic overproduction inside the follicle may lower oxygenation of the skin and prevent healthy nourishment of the hair roots. Over time, the hair becomes thinner, more dry and brittle or covered with sebum. Accordingly, it starts to fall out in abnormal quantities, leading to thinning or various forms of alopecia.