Your lips are particularly thin and delicate
The area where you usually apply your oils, balms and lipsticks is called the 'lip line' or 'vermillion border'. The skin here is particularly thin: it consists of 3 to 5 layers of epithelial cells, compared to around 16 on the rest of your face (1). This extreme thinness makes it more vulnerable to environmental damage, from factors such as friction, wind, cold and certain potentially irritating substances. So, why use a lip oil? Because, without suitable products designed to reinforce its weak natural protection, the skin on the lips can tend to become uncomfortable and sensitive.
Do your lips tend to get dry easily?
Unlike the rest of your face, your lips have almost no sweat glands or sebaceous glands (1). These glands, by producing sweat and sebum, normally help to form a hydrolipidic film. This partial occlusive film helps to regulate water loss through evaporation and reduces the risk of dehydration. As our lips are virtually devoid of these glands, they can often appear dry or flaky. Various habits can exacerbate this, such as licking or biting your lips (2). Using a lip oil or balm helps to limit these small daily losses of water.
The lip area is generally more sensitive
Relying solely on a minimal skin barrier to stay comfortably moisturised, our lips are one of the most delicate areas of our face. This fragility is a well-established scientific fact (2). It is all the more important given that our lips, which function as the interface between our outer skin and our oral mucosa, are on the front line when it comes to external stressors. Exposed daily to allergens (including, notably, those found in conventional make-up products), the foods we eat (heat, sugar, salt, spices, alcohol, etc.) and the weather, they quickly become damaged and sometimes end up showing signs of inflammation. This manifests as a burning or stinging sensation, or cracking.













