Our know-how

Guérande Cosmétiques was born from the observation of nature and ancient knowledge. Inspired by the elements and guided by science, our research and development laboratory studies the balance of the oceans, particularly the salt marshes. This study of oceanic environments is called thalassic science, a unique expertise that allows us to offer products with powerful marine active ingredients, dedicated to your well-being.

Sea jewel

Mother-Waters, which form in the salt marshes through the movements, heat, and wind, become concentrated with mineral salts and trace elements. Their mineral richness becomes 8 to 10 times greater than that of seawater. Everything in their biological composition shows that Mother-Waters closely resemble the vital environment in which life first appeared on Earth.

Premium water

Water is the main component of cosmetic products, but it is most often incorporated in a demineralized, treated, and neutral form. By incorporating Mother-Waters into its treatments, Guérande Cosmétiques restores water’s role as a carrier of life and activity.
Mother-Waters allow for the remineralization of the epidermis and better absorption of cosmetic active ingredients, thanks to the isotonic osmoactive principle.

Isotonicity for a perfect affinity with the skin

Unlike hypertonic or hypotonic waters, the isotonic water offers the same concentration between the surrounding water and intracellular water. This allows the epidermal cells to better absorb the mineral salts and trace elements. Additionally, at Guérande Cosmétiques, the entire formula is isotonic, enabling all the incorporated active ingredients to be well absorbed by the skin.

Regenerate, repair, revitalize, soothe

Impossible to reproduce in a laboratory, these living waters, exceptionally rich in mineral salts and trace elements, form the foundation of Guérande Cosmétiques' product quality. The result of years of research and development, the incorporation of Mother-Waters into our product formulas relies on the expertise of our laboratory team to stabilize them —an expertise now protected by a patent.

The alliance of Mother-Waters and sea fennel.

As experts in formulating skincare incorporating Guérande's precious Mother-Waters, our laboratory has developed an anti-aging complex that draws from the hidden benefits of the meeting between land and sea. This unique alchemy between Mother-Waters and sea fennel has proven effectiveness, guaranteed by a patent, and is embodied in our Anti-aging Expert range.

Preserved cellular comfort

Energizing activity (1) ⁽¹⁾

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of cellular energy

Regenerating activity (2) ⁽²⁾

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of cell proliferation

Restorative activity (3) ⁽³⁾

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to improve
epidermal reconstruction

Soothing activity (4) ⁽⁴⁾

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sensations of discomfort

(1) - In vitro measurement of ATP synthesis, in the presence of isotonically dosed Mother-Waters. , (2) - In vitro measurement of cell proliferation, in the presence of isotonically dosed Mother-Waters., (3) - In vitro measurement of cell proliferation, in the presence of isotonically dosed Mother-Waters., (4) - In vitro measurement of cell proliferation, in the presence of isotonically dosed Mother-Waters.

A fertile nature

Mother Waters are complemented by the action of plants and sediments selected for their properties that enhance the vitality of the skin: clay - plants - algae - salts.. These plants and algae, known as halophytes, live in extreme environments and possess an extraordinary defense system.
They produce polysaccharides, powerful molecules unique to the marine environment that strengthen your skin's defenses.

Maintaining hydration

• Green Salicornia , rich in amino acids known to promote moisture retention.

• The green macroalgae Enteromorpha, rich in polyphenols known for their antioxidant properties, and in fructo-oligosaccharides known to support moisture retention.

Anti-oxidant property

• Red salicornia, rich in polyphenols recognized for their antioxidant properties including a powerful flavonoid that helps protect against skin aging.

Purifying and rebalancing action

• Marine clay, loaded with magnesium, iron and zinc, known to reduce and limit excess sebum.

  • Guérande salt, naturally rich in minerals and trace elements, gently purify and exfoliate the skin.

Thalassic science and treatments for your skin.

Each Guérande Cosmétiques product is therefore a concentrate of innovation that, with Mother-Waters, draws on the mineral and plant riches of the oceans for perfect affinity with the skin.
Our research allows us to care for your natural beauty, which needs to be protected and balanced.