The Biologique Recherche Masque Vivant is a purifying, rebalancing treatment mask for oily, congested and unbalanced skin. Combining bio-fermented actives with astringent botanicals, it mattifies, tightens pores and restores clarity without stripping. Yeast Extract — the lead active — rebalances the skin's microbiome, regulates excess sebum, encourages gentle cellular turnover and reinforces barrier resilience, leaving the skin clearer, more balanced and less reactive over time. Cucumber Extract soothes and hydrates, reducing redness and inflammation, while Witch Hazel and St John's Wort Extract deliver astringent and anti-inflammatory action that tightens pores and calms irritation. Cider Vinegar refines the skin's surface and supports pH balance, while Bentonite — a natural mineral clay — draws out impurities and absorbs excess oil for a visibly purified, mattified result. Together these actives leave the complexion clean, refined and rebalanced.