MONPURE Follicle Boost Hair Density Serum 50ML. This award-winning scalp serum helps prevent hair thinning and cultivates thicker, fuller and healthier hair. Powered by concentrated active ingredients, including retinol, this hair-thickening serum speeds up cell turnover and decongests hair follicles, improving the absorption of pumpkin seed extract. Voted 'Best Hair Growth Serum' 2022 by Good Housekeeping Institute