The Bi-Phase Oil-in-Serum is a powerful anti-aging concentrate for intensive skin rejuvenation. It combines the nourishing care of its precious oils with the lightness and intensive action of a serum. The two-phase formulation stimulates regeneration, cell cleaning, and renewal. Apply the serum morning and/or evening to cleansed face and neck. Once absorbed, massage to spread the treatment. This serum can be used alone.