Is Vitamin E a boon for dry skin?

Dry skin is characterized by redness, feelings of tightness, and limited elasticity. Being relatively thin, it is highly sensitive to temperature changes and tends to flake regularly. To the touch, dry skin often feels rough and presents a "crocodile skin" appearance. Its lack of flexibility makes it particularly prone to skin aging. Dry skin is a skin type. Therefore, it is permanent, unlike dehydrated skin, which is a temporary condition. Moreover, dry skin is not lacking in water, but in fat, due to a low sebum production. This impairs the hydrolipidic film and weakens the skin. To counteract this fragility, it is recommended to adopt a customized skincare routine with nourishing active ingredients.

A naturally occurring, fat-soluble vitamin E is primarily known for its antioxidant properties and its ability to combat oxidative stress. Indeed, its unique chemical structure allows it to donate an electron to free radicals in order to stabilise them. As a reminder, free radicals are reactive species naturally formed during cellular metabolism and neutralised by endogenous antioxidants. However, certain external factors (UV rays, pollution, tobacco...) cause the excessive generation of free radicals in the skin cells. An imbalance then occurs and the body's antioxidants are no longer sufficient to eliminate them. It is therefore appropriate to provide antioxidants orally or topically, such as vitamin E. Without this, free radicals damage the membrane phospholipids, which weakens the skin barrier. Thus, vitamin E could have an interesting indirect epidermal structural role for dry skin.

Furthermore, an in vitro study suggests that vitamin E has a moisturising effect and can increase the hydration level of the stratum corneum, the outermost layer of the skin. However, the corresponding mechanism of action has not been disclosed, and a concentration of 5% vitamin E would be necessary to achieve this effect. Regarding in vivo studies, scientists almost never report on the moisturising properties of this molecule, particularly when it is used in topical application.

To date, evidence supporting the effectiveness of Vitamin E in hydrating dry skin remains somewhat limited.