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Strengthen

Le Sérum Jour

The morning step of the Olérique ritual: Strengthen.

Product Price: €74,00

A daily serum for skin carrying the pace of modern life: stress, screens, pollution, fatigue, and the first signs of imbalance.

Powered by exosomes and B-vitamins, it strengthens the skin’s biological defences, supporting a complexion that looks clearer, more even, and more resilient over time.

 

Made in France · Barrier-first · Melanin-conscious · Hormone-aware

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Le Sérum Jour is the Strengthen step of our 4S philosophy.

ADVANCED EXOSOME COMPLEX
Within the formula, botanical exosomes bring a new generation of biotech protection. These cell-signalling messengers work with the skin’s own communication systems to support resilience, clarity, and natural renewal. They help reinforce the skin’s biological defences against the daily stressors that accelerate visible ageing.

VITAMIN B COMPLEX
A precision blend of three essential B vitamins. Niacinamide dosed at 3% reinforces barrier strength, helps regulate visible redness, and supports a more even tone. B6 and B9 complete the complex by supporting the cellular processes that keep skin functioning steadily.

STABILISED VITAMIN C
Ascorbyl Tetraisopalmitate, an oil-soluble form of vitamin C selected for its stability and skin compatibility. It supports antioxidant defence, helps protect against free-radical stress, and contributes to a clearer, more even-looking complexion. Unlike pure ascorbic acid, this form is less prone to oxidation and better suited to a daily barrier-first formula.

GRAPE FERMENT EXTRACT
Naturally produced when skin is exposed to sunlight, vitamin D plays a critical role in skin biology. This bioactive extracted from grapes naturally mirrors the action of vitamin D proteins in skin, supporting the barrier function, antimicrobial defence, and cellular balance that define resilient skin.

HYALURONIC ACID
Maintains hydration through the day, holding water at the skin’s surface for sustained suppleness and comfort.

Aqua, Propanediol, Dimethyl isosorbide, Glycerin,
Niacinamide, Sorbitol, Sodium magnesium silicate,
Magnesium chloride, Xanthan gum, Folic acid, Sodium
chloride, Pyridoxine HCl, Astragalus gummifer gum,
Sodium citrate, Saccharomyces/Grape ferment extract,
Ascorbyl tetraisopalmitate, Sodium hyaluronate, Balanites
roxburghii seed oil, Citric acid, Caesalpinia sappan
(exosomes) extract, Sodium benzoate

The ingredient list is updated regularly and may be subject to variation. Please refer to the list printed on the product packaging before use.

Apply every morning to face and neck. Allow to absorb before
applying La Crème Jour. Always follow with SPF.

Customer Reviews

Overall rating: 4.8 / 5 from 16 reviews.

Customer photo review of Le Sérum Jour

The day serum combined with the day cream keep my skin bouncy and prevent acne. I used to always get acne in the lower side face and near the chin but literally have not experienced it since I started using Olerique products! I also had dull skin, and now it feels a lot more alive and looks brighter. I can’t even describe how much this changed my skin and my confidence. I’m obsessed.

Le Sérum Jour

A beautiful formula and so easy to integrate into my routine! Have been looking for an anti-oxydant and gentle formula for so long and so happy with the results.

Le Sérum Jour

It is helping with my discoloration and making my face more plump and healthy

Le Sérum Jour

Exactly what my postpartum skin needed!!!!

Le Sérum Jour

Was very hydrating, easily absorbed into skin and did not leave a residue.

Le Sérum Jour

I like that the serum doesn't have a pipette.

Le Sérum Jour

I love how the day serum feels on my skin. It also absorbs really fast and makes my skin glow. I really liked the serum.

Le Sérum Jour

Its rich texture doesn't irritate the skin.

Le Sérum Jour

La couleur m'a tout de suite donné envie. Moi qui suis hypersensible aux textures, j'ai trouvé la texture parfaite, celle qui me correspond le mieux !

Le Sérum Jour

I liked the color and the texture felt rich. Honestly I feel I have a glow and somehow look better these days.

Le Sérum Jour

I really enjoyed using it, because I felt a real effect over the way my skin looks throughout the day. The day serum is very effective when it comes to securing a glow on the face. I would choose it for its effectiveness and its ease of use: simple and quick, perfect for my lifestyle!

Le Sérum Jour

I love it. It absorbs really quickly, and you only need a small amount. The texture feels beautiful on the skin, lightweight but still nourishing, and it sinks in almost instantly without feeling sticky. My skin absorbs it so well, and I genuinely feel like it has helped improve my discoloration and overall complexion.

Le Sérum Jour

I would describe the feeling like a day shot of energy to my skin.

Le Sérum Jour

I love it. It absorbs really quickly, and you only need a small amount. It blends easily into the skin, and I genuinely feel like it has helped improve my discoloration.

Le Sérum Jour