of our trialists found their skin more supple, smoother and deeply hydrated¹.
Le sérum de Biarritz
Discover the plumping power of Ocean Therapy.
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Free delivery within Metropolitan France for your first order with code BIENVENUE
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2 free samples, on request, for purchases over €30
Purchase the pack
24-hour hydration Duo
It contains :
Le sérum de Biarritz
- 30 ml
La crème de Biarritz
- 50 ml
€41.61€43.80
Save 5%
Complete your routine
Description
Designed as the perfect complement to la crème de Biarritz, this serum - enriched with our patented red algae extract from the Basque Coast with antioxidant properties and highly concentrated natural-origin hyaluronic acid - provides intense hydration, plumps and smooths the skin¹, and helps prevent the appearance of fine lines. It enhances the efficacy of the skincare applied afterwards, leaving the complexion fresh, supple and radiant.
And it is proven:
- 100% of trialists reported a more radiant and luminous complexion¹
- 95% of trialists found their skin more supple, smoother and deeply hydrated¹
Le sérum de Biarritz can be applied to the face, eye contour and neck.
Its texture and fragrance?
Its light, milky texture is absorbed almost instantly for an immediate refreshing effect.
A fresh and delicate fragrance: made with 100% natural-origin ingredients, it promises a unique, sensorial immersion.
Who is it for?
Formulated for all skin types, le sérum de Biarritz is ideal for use from the first signs of fine lines, or for people that are looking for improved hydration and bounce.
Suitable for pregnant and breastfeeding women. Tested under dermatological supervision.
¹ Use testing carried on 20 volunteers over 28 days, twice-daily application.
Composition
Composition
Certified Organic formula, made of 100% natural-origin ingredients and 43.8% Organic ingredients.
Key ingredients:
- Hyaluronic acid: 100% natural-origin, obtained through biofermentation. It acts as a water reservoir for long-lasting hydration. With a midrange molecular weight rigorously selected by our R&D team, it replenishes the skin and ensures effective hydration both on the surface and deep within the skin layers, improving their appearance and texture.
- Alga-Gorria®, extract of red algae (Gelidium sesquipedale) harvested on the Basque Coast: powerful antioxidant that neutralises free radicals to prevent cellular damage and skin ageing caused by the environment. Laboratoires de Biarritz patent.
- Hyaluronic acid monomer: deeply hydrates the skin and reinstates natural hyaluronic acid production. It enhances the efficacy of skincare applied afterward by improving the penetration of water-soluble active ingredients.
Vegan: the product contains no raw materials of animal origin and was not tested on animals (in accordance with EU legislation).
Complete ingredient list: hover your mouse over the name of an ingredient to learn its role.
INGREDIENTS: Aqua, Glycerin, Squalane, Olus Oil, Xylitylglucoside, Glyceryl Stearate Citrate, Hydrolyzed Glycosaminoglycans, Anhydroxylitol, Sodium Levulinate, Polyglyceryl-3 Stearate, Glyceryl Caprylate, Propanediol, Parfum, Linoleic Acid, Xylitol, Hydrogenated Lecithin, Biosaccharide Gum-1, Sodium Anisate, Lysolecithin, Sclerotium Gum, Tocopherol, Aloe Barbadensis Leaf Juice Powder *, Sodium Hyaluronate, Gelidium Sesquipedale Extract, Polyglyceryl-4 Caprate, Sodium Phytate, Pullulan, Xanthan Gum, Oleic Acid, Citric Acid, Palmitic Acid, Alteromonas Ferment Extract, Phenethyl Alcohol, Stearic Acid, Silica, Vanillin, Beta-Caryophyllene, Linolenic Acid
*: Ingredients from Organic farming
The list of ingredients may be subject to modification. We recommend verifying the list displayed on the purchased product.
100% of the total ingredients are of natural origin.
43.8% of the total ingredients are from Organic farming.
COSMOS ORGANIC certified by ECOCERT Greenlife according to the COSMOS standard.
Commitments
Commitments
Laboratoires de Biarritz is committed to protecting the planet through the use of well-designed packaging and short production cycles!
Skincare elaborated in Biarritz, produced and stored in the Pyrénées-Atlantiques region of France. 100% made in France.
Well-designed packaging
Recycled and recyclable packaging.
Tube contains recycled plastic.
Cardboard case printed with plant-based inks on paper from sustainable forestry.
Remember to recycle!
Recycling rules may vary by location. To learn more, click here.
How to use
How to use
Areas of application: face, eye contour area, neck.
Apply in the morning and evening on clean skin before using other skincare.
Proven efficacy
- 95%
- 86%
of our trialists found the skin is plumped up¹.
- 100%
of our trialists reported a more radiant and luminous complexion¹.
- +52%
hydration in 1 hour².
¹ Use testing in a group of 20 volunteers over 28 days, twice daily application.
² Corneometry measurements after application on 10 volunteers.
Proven efficacy
Complete your routine
Complete your routine
La crème de Biarritz face
Apply in the morning and evening on the face, neck and décolleté in complement to your other skincare.
Add to cart
Complete your routine
La crème de Biarritz corps
Apply la crème de Biarritz corps morning and/or evening, on dry or damp skin.
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Add sunshine to your beauty routine: a 100% natural-origin & certified organic made-to-measure tan.
Complete your routine
Self-tanning drops
Mix with a small amount of your usual face or body skincare in the palm of your hand: 1 to 3 drops for a light to medium effect, 4 to 7 drops for a more intense effect. Apply uniformly, blending in around the eyebrows, the roots of the hair, the elbows, and the knees.
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Radiance Face Scrub
A gentle, certified organic exfoliator for smooth and radiant skin.
Complete your routine
Radiance face scrub
Apply the radiance face scrub once to twice per week on dry or wet skin. Delicately massage with circular movements, avoiding the area around the eyes. Rinse thoroughly with water.
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The face rehydrating mask is a certified organic multi-effect rehydrating soak, with a rich and enveloping texture.
Complete your routine
Rehydrating mask
Apply generously once to twice per week on a clean face and neck.
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Experience a sensorial, certified organic cleansing oil that effortlessly removes even waterproof make-up.
Complete your routine
Cleansing oil
Warm the cleansing oil in the palm of your hands and massage it into dry skin on the face, the neck, the eyes, and the lips.
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SOPHIE C.
Verified Buyer
Très bon produit mais le doseur ne fonctionne pas, dommage.
Comment from Laboratoires de Biarritz the 05/01/2026
Bonjour Sophie,
Si le flacon ne délivre pas de produit, il se peut que cela soit dû à un désamorçage de la pompe.
N'hésitez pas à contacter notre Service client ([email protected] ou 05 47 75 81 05) qui saura vous dépanner.
Cordialement,
Laboratoires de Biarritz
08 January 2026
Gisele S.
Verified Buyer
Bien
14 December 2025
Valérie T.
Verified Buyer
Ce sérum est pas mal, il hydrate bien mais l'odeur est pas terrible
Comment from Laboratoires de Biarritz the 28/10/2025
Bonjour Valérie,
Pour le Sérum de Biarritz, nous avons fait le choix d'un parfum frais et délicat, composé à 100% d'ingrédients d'origine naturelle.
Cordialement,
Laboratoires de Biarritz
28 October 2025
Ophélie B.
Verified Buyer
J'aime beaucoup la texture
12 October 2025
Daily Organic high protection that unifies the complexion, prevents dark spots, and makes your skin look sublime.
The certified organic skin repair1 reflex for damaged lips.
New
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The moisturising and replenishing power of Ocean Therapy.