Monpure London’s Follicle Boost Hair Density Serum works to stimulate hair follicles, improve cell turnover on the scalp, prevent hair loss and thinning while actively promoting thicker, fuller hair. Hero ingredient pumpkin seed extract blocks the production of hormone DHT, a major hair loss offender, while skincare holy-grails retinol and lactic acid decongest follicles and promote healthy cell renewal.