Le Sérum Jour

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.