Le Grand Sérum is a sublimating elixir, a genuine concentrate of beauty whose action grows more intense with each consecutive application. It is recommended for all Skin Instants. Apply a few drops of Le Grand Sérum to clean skin all over the face, neck and décolleté with light upward strokes. 

Use mornings and/or evenings.  This product is intended as a final touch of your Biologique Recherche skin care program.