Dry skin: how to restore the skin barrier sustainably?

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

Understanding the skin barrier

The skin barrier is primarily made up of the stratum corneum, composed 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, harsh shower gels, or chemical exfoliants
• Skin conditions: eczema, atopic dermatitis, psoriasis — diagnosis to be confirmed by a dermatologist [2]
• Age (skin becomes thinner over time)

Active ingredients studied to support the skin barrier

Ceramides

Lipids naturally present in the stratum corneum. Their topical application is studied for restoring 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 relipidation [5].

Usage tips

• Apply 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 site. A Niacinamide 500 mg in capsule form (NOW Foods) is available as a dietary supplement, distinct from topical use.

Conclusion

Dry skin is not inevitable. A suitable 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.
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.
5. Fuchs J et al. Efficacy of natural oils in the treatment of dry skin. J Cosmet Dermatol. 2010.

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