Used 5x lightly . Make an offer. This bottle will last you a long time ! I prefer the P50 with more of a burn (I know I’m crazy lol) . According to the website this formula is medium strength. Lotion P50 V toner with no phenol is a gentle all-in-one toner, balancer and exfoliating lotion enriched with vitamins for normal to dehydrated skin types. Lotion P50V is a vitamin-enriched exfoliating lotion that gently purifies, mattifies, moisturizes, and helps maintain a balanced pH level on the surface of the skin. If you only use one product, it's a lotion P50V! Vitamin-enriched toning exfoliator that does not contain phenol and is ideal for normal to dry skin. Lotion P50V, the most famous and coveted product, is the keystone to Biologique Recherche's skin care treatment. Lotion P50V removes the dead cells and impurities, tones, hydrates and brightens the skin. This anti-aging lotion prevents formation of fine lines and promotes healthy epidermis. All Biologique Recherche skin care treatments, whether administered at home or in a beauty institute, start with the P50 ritual. It is applied in the morning and in the evening. This formula of P50 called p50V does not contain phenol and is recommended for normal to dry skin.