Serum & Cream Duo Set: First Signs of Ageing & Hydration

Skin hydration refers to its ability to retain water in its outer layers. The skin is 70% water, but only a small portion (10 to 20%) is found in the epidermis. This water is essential for ensuring supple, plump, and radiant skin.

Every day, the skin naturally loses between 0.3 and 0.4 litres of water through evaporation: this is known as insensible water loss (IWL). The hydrolipidic film on the surface of the epidermis is composed of water and lipids and acts as a protective barrier against dehydration. However, external factors such as weather conditions (wind, cold, sun, pollution, etc.), overly harsh cleansing, a poor skincare routine, or natural aging can compromise this skin barrier. As a result, water evaporates more quickly, the skin becomes dehydrated, and it feels uncomfortable, looks dull, and develops fine lines.

The surface of your skin is an acidic environment composed of microorganisms, sweat, lipids, shedding corneocytes, cells undergoing keratinisation, and transepidermal water. It is prone to dehydration if these components are compromised, particularly at three levels.

First, at the level of the lipid cement, which prevents water loss because it is hydrophobic (repels water).

Next, there are the natural moisturising factors (NMF), which can account for up to 30% of the total dry weight of the stratum corneum. This is a complex of various substances, including amino acids, urea, lactate, and pyrrolidone carboxylic acid (PCA).... These are water-soluble, highly hygroscopic compounds that capture and retain water within the hydrolipidic film.

Finally, the hydrolipidic film forms a slightly acidic (pH 4.2 to 6.7) protective emulsion on the stratum corneum of the water-in-oil (W/O) type, which slows down dehydration.

(The above information is a summary compiled by our experts based on currently available scientific data. It is provided for informational purposes only.)

Yes, the serum and the cream are suitable for pregnant and breastfeeding women.

It is recommended to start a preventive skincare routine from the age of 25. From this age, the natural production of collagen and elastin gradually decreases, which promotes the appearance of the first fine lines. An anti-wrinkle cream helps hydrate, protect, and stimulate skin regeneration, thus delaying the visible signs of aging.