Traditionally, we distinguish four main categories of skin: dry skin, combination skin, oily skin, and normal skin, defined according to the activity of the sebaceous glands responsible for sebum production. However, skin is more complex than we think. At Typology, we have studied the subject more closely. Based on a more advanced scientific methodology, we have determined not 4 but 24 different skin typologies, and the DE(.) profile is one of them. Find more information about this skin typology in this article.
Profile DE(.), further explanations on this skin type.
Summary
Published on August 7, 2024, by Stéphanie, PhD, Doctorate in Life and Health Sciences — 4 min of reading
Themes:
More details on the meaning of the initials DE(.).
Skin Ageing BEGINNER
Oxidation Factor OVERVIEW
Sebum Production BALANCED (.)
The letter "D" for Beginner regarding skin ageing.
The letter (D) indicates the emergence of the first visible signs of ageing when the skin is in motion . Fine lines are the first to appear and are the easiest to spot. They are typically located at the outer corner of the eyes. A change in skin texture or a lacklustre complexion may also be observed. These are generally visible around the age of 25. Indeed, from this age, we observe the start of a decline of about 1% each year in the production of collagen, one of the structural components of the skin, leading to a disorganisation of the skin's connective tissue and a change in skin elasticity. A slowdown in the renewal of epidermal cells has also been noted, gradually leading to a thinning of the skin's barrier function. In response to this phenomenon, water evaporates more and more: the skin then loses its luminosity and wrinkles become more pronounced. A decrease in the production of hyaluronic acid by an average of 6% per decade adds to this.
The second letter "E" stands for Exposure to oxidation factors.
The "E" indicates that the skin is highly exposed to external aggressions (solar radiation, air pollution, tobacco, stress, thealcohol...), as well as insufficient sun protection habits relative to the phototype and exposure rhythm. These factors promote the production of free radicals, highly unstable and reactive molecules that can have a lasting impact on the skin. However, this action is normal in all living organisms that consume oxygen.
However, in the event of an imbalance between the production of free radicals and the body's natural ability to neutralise them, oxidative stress sets in and skin damage occurs. Indeed, these reactive oxygen species contribute to the degeneration of skin cells, both at the level of the epidermis and the dermis. All vital components of the skin such as collagen, hyaluronic acid, elastin, lipids and DNA find themselves under attack, thereby causing damage and malfunctions.
This oxidation process can thus affect the structure of the skin, leading to premature skin ageing or even cancer. Initially superficial wrinkles that gradually deepen, less toned skin and a duller complexion can start to appear, even before old age. To slow down their action and thus prevent premature skin ageing, the daily application of antioxidant-based treatments, in addition to an appropriate sun protection , is recommended.
The point "." for Balanced Sebum Secretion.
The "." indicates a balance in sebum production. Naturally produced by the sebaceous glands, the sebum is a fatty substance that helps the skin protect itself against external aggressions and fight against dryness by contributing to the composition of the hydrolipidic film. Comfortable and soft to the touch, this skin type has a matte appearance without a shiny or "crocodile skin" effect, and its skin texture is regular and uniform with pores that are tightened. It is naturally well hydrated, protected, and blemishes are rare. However, despite this skin balance, it also requires specific care to maintain its abilities and strengthen its regulatory mechanisms.
