Biologique Recherche Quintessential SerumsThe Biologique Recherche Quintessential Serums are the purest formulations in the Biologique Recherche range. Their only active ingredients are amino acids or short peptides and a bare minimum of preservatives. The Biologique Recherche Quintessential Serums are designed to treat specific skin imbalances like dehydrated and devitalized skin. These Quintessential Serums can be used alone or mixed together.
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