Serum Vivant

Sérum Vivant, also written Serum Vivant, is a daily leave-on serum from Biologique Recherche, formulated to visibly correct persistent adult blemishes and the redness that comes with them. It works by rebalancing the skin rather than stripping it, using a prebiotic, a postbiotic and a fermentation-derived purifier so that congestion clears without the dryness and peeling that usually come with blemish care. It is the daily counterpart to Masque Vivant, the fermented yeast mask that made Biologique Recherche a name with congested skin.

Why Adult Blemishes Are Different

Blemishes after 25 sit on skin that is more fragile and slower to recover than teenage skin, which is why the products that worked at 16 often make things worse at 35. Research cited by Biologique Recherche puts persistent blemishes at roughly two in five women after the age of 25. Sérum Vivant was developed for exactly that skin: strong enough to correct, gentle enough to use twice a day indefinitely.

Key Benefits

• Visibly reduces persistent blemishes and post-breakout redness

• Regulates excess sebum for a more balanced, less shiny complexion

• Refines uneven skin texture

• Supports the skin barrier and microbiome rather than compromising them

• Comfortable enough for daily long term use, including on sensitive skin

The Three Actives

Yeast Extract, a postbiotic. The signature Vivant active and the same fermented yeast at the center of Masque Vivant. Targets blemish related redness and supports blemish-prone skin.

Inulin, a prebiotic. Feeds the skin existing microbial balance so the barrier stays resilient while blemishes clear.

Polylysine, biotech derived. A gentle purifier that reduces surface impurities without the irritation of harsher blemish actives.

Clinical Results

Applied twice daily, results build progressively.

• At 14 days: 27 percent reduction in excess sebum and 19 percent more refined texture

• At 28 days: 42 percent reduction in persistent blemishes, 21 percent reduction in blemish related redness, and 19 percent improvement in skin barrier strength measured by reduced water loss

Instrumental measurement and clinical scoring across three studies of 19 to 21 volunteers with combination to oily, blemish prone skin, half of whom had sensitive skin, applying twice daily.

Texture and Sensory Signature

Light, watery and faintly gel like. It absorbs in seconds and leaves no greasy finish. The brown color and the distinctive scent both come from the fermented yeast extract and are left unmasked on purpose. If you have used Masque Vivant, you already know them. They are the signature of the Vivant range and a signal that the ferment is present at a real concentration.

Sérum Vivant or Masque Vivant

The same ferment working on two different rhythms. Masque Vivant is a rinse off mask used one to three times a week for 15 minutes, deep purifying and resetting congestion with results visible after a single use. Sérum Vivant is a leave on serum used twice daily, correcting persistent blemishes and redness progressively, with measurable results at 14 days and substantial results at 28. The mask clears what is already there. The serum works on why it keeps coming back. Most people use both.

Best For

Skin types: oily, combination and blemish-prone skin, including sensitive skin.

Skin concerns: persistent blemishes, excess oil, uneven texture, visible redness and congestion.

Why We Recommend It

Persistent blemishes need formulas that respect the barrier, and very few of them do. Sérum Vivant is one of the rare ones that corrects without stripping, which is why it layers into a full Biologique Recherche protocol rather than fighting it. Shop Rescue Spa is an authorized Biologique Recherche retailer, so every product reaches you exactly as it left the laboratory. If you are not sure where Serum Vivant belongs in your routine, book a Skin Instant consultation with a Rescue Spa esthetician.