Each Biologique Recherche treatment, whether at home or in a beauty institute, includes the application of P50 lotion. P50 lotions gently exfoliate, balance excess sebum, moisturize and help maintain the skin’s acidic pH.  For 40 years, Biologique Recherche has been developing this unique skincare program that supports the natural exfoliation process of the epidermis to aid the reconstruction of the epidermal shield.