A: Biologique Recherche Lotion P50 is the most famous and coveted product in the skincare world. It’s an active exfoliator that has been around for over 30 years. It’s a potent formula that tackles wrinkles, enlarged pores, regulates the sebum, hydrates, and helps skin maintain the correct pH balance. It prevents ingrown hairs, that’s why men love it. The Lotion P50 “1970” version has a high concentration of botanical, marine and biological extracts. It has the highest quality of active ingredients that provide dramatically visible results yet it does contain lactic acid and a miniscule amount of phenol which activates the product. So if you are pregnant or nursing, or going through cancer treatments I would advise to use the regular Lotion P50 (without phenol). As for me I’ve been using Lotion P50 “1970” for 15 years and I cannot imagine going a morning or night without it, because I love the way it makes my skin look. There is nothing else out there that compares!