Lauded as a “facial in a bottle”, P50 is the hero product of iconic French skincare line Biologique Recherche. P50 is known for its ability to balance the pH of the skin, purify the pores, and reveal a fresh, radiant complexion. This cult-classic toner is not one size fits all, though. To ensure that your skin receives the best results, Biologique Recherche has created six versions of P50 so that you can use the one best tailored to your skin type and concerns.