Dry skin: how to restore the skin barrier sustainably?

Dry skin affects a large part of the population, especially in winter. It is characterized by dehydrated epidermis and feelings of tightness. To support the skin barrier, it is useful to understand its mechanisms and rely on studied active ingredients.

Understanding the Skin Barrier

The skin barrier is mainly composed of the stratum corneum, made up of keratinocytes and intercellular lipids (ceramides, cholesterol, fatty acids). When it is altered, an increase in transepidermal water loss is observed [1].

Common Causes of Dry Skin

• Exposure to cold, wind, dry air, or heating
• Detergent soaps, aggressive shower gels, or chemical exfoliants
• Skin conditions: eczema, atopic dermatitis, psoriasis — diagnosis to be confirmed by a dermatologist [2]
• Age (thinner skin over time)

Studied Active Ingredients to Support the Skin Barrier

Ceramides

Lipids naturally present in the stratum corneum. Their topical application is studied to rebuild the lipid barrier [3].

Hyaluronic Acid

A humectant that attracts and retains water, helping to rehydrate the epidermis.

Vegetable Glycerin

Captures ambient humidity, generally well-tolerated.

Niacinamide (Vitamin B3)

An active ingredient studied for its role in ceramide production and strengthening barrier function [4].

Vegetable Butters and Oils

Shea butter, sweet almond oil, or avocado oil provide fatty acids that contribute to skin relipidization [5].

Usage Tips

• Apply the moisturizer to slightly damp skin after showering to maximize the effect [3].
• Use a soap-free cleanser (syndet) with a physiological pH.
• Avoid water that is too hot.

Availability on Pharmaplusfrance.store

We do not currently offer a dedicated topical ceramide/niacinamide range on the website. Niacinamide 500 mg capsules (NOW Foods) are available as a dietary supplement, distinct from topical use.

Conclusion

Dry skin is not inevitable. An adapted routine, based on studied active ingredients, can help restore skin comfort. In case of persistent very dry skin or suspected pathology (eczema, psoriasis), consult a dermatologist.

Scientific References

1. Draelos ZD. Ceramide-containing moisturizers: barrier repair in dermatology. Am J Clin Dermatol. 2018. (source to be verified)
2. Haute Autorité de Santé. Atopic dermatitis: good practice recommendations. HAS, 2020.
3. Draelos ZD. (see ref. 1)
4. Draelos ZD. Niacinamide and its role in dermatology. Cutis / Dermatol Surg. (source to be verified)
5. Fuchs J et al. Efficacy of natural oils in the treatment of dry skin. J Cosmet Dermatol. 2010. (source to be verified)

Important correction note: The previous version of this article cited the official summary of product characteristics (SmPC) for acitretin, a prescription medication reserved for the treatment of severe forms of psoriasis, which is teratogenic, as well as a Vidal sheet. This reference had no connection to common dry skin and should never have been included in a parapharmacy content. It has been removed.

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