Yall-O2 Serum

• Fills in grooves and wrinkles caused by dehydration or sagging.
• Increases skin and lip volume, softening features.
• Provides deep and prolonged hydration thanks to its high content of pure hyaluronic acid (25%).
• Restructures the epidermis, improves elasticity, and stimulates collagen and elastin production.
• Oxygenates tissues, revitalizing their metabolism and increasing their resistance.
• Soothes, repairs, and restores density and comfort to weakened skin.
• Improves skin microrelief, smoothness, and luminosity from the first applications.
  

• Hyaluronic acid (low molecular weight): highly effective in correcting deep wrinkles. It acts from within, improving firmness to correct furrows and gravitational folds. This active ingredient also acts on the surface, sealing in hydration, smoothing the micro-relief, and strengthening the skin barrier. This makes it especially effective on superficial wrinkles (dehydration lines) and dynamic wrinkles (expression lines around the eyes and lips).
  
• Biologique Recherche Oxygenating Complex: improves oxygen utilization to promote tissue regeneration.
  
• Lupine lipopeptides: increase firmness, stimulate collagen synthesis, and strengthen skin structure.
  
• Walnut extract:antioxidant and regenerating, it stimulates cell renewal and improves skin density.
  

1. Apply morning and evening after the appropriate cleansing milk and Lotion P50.
2. Apply Sérum Yall O2 to the most affected areas of the face, neck, and décolleté, especially those with static wrinkles (eye contour and lip contour).

This product offers a dual use:

It can be applied as an intensive treatment serum, before your usual skincare cream: to keep the skin smooth, supple, and rejuvenated

It can be applied as a finishing fluid, after the cream and as the last step in your facial routine: to create a protective anti-dehydration shield that envelops the skin, leaving it elastic, silky, and intensely hydrated.

The name Sérum Yall O2 honors Yvan Allouche, co-founder and driving force behind Biologique Recherche's biological and technical vision. It was his son, Philippe Allouche, who named this serum with the acronym “YALL” (from Yvan Allouche), as a direct tribute to his father and his legacy as the creator of the brand's dermo-scientific approach. The “O2” in the name refers to the exclusive oxygenating complex incorporated into the formula, designed to stimulate cellular metabolism and revitalize the skin.

This symbolic gesture makes Sérum YallO2 a formula with double value: scientific and emotional, uniting the power of hyaluronic acid as a key molecule in hydration and skin architecture, with the formulating heritage of the person who laid the foundations of the brand.

Indicated for all skin types, for the prevention and correction of skin aging. Ideal as cosmetic support after hyaluronic acid injections, to prolong results (recommended to start treatment 1 to 2 months after the medical-aesthetic procedure).