not impressed [SEP] lately i have become enamored with hair building fibers for both root and scalp coverage the results have been amazing and many of the products i have used contain keratin or gossypium as the primary ingredient the toppik hair building fibers contains keratin but the fibers were larger and coarser than others and did not blend or adhere as well it was not the natural looking coverage i had come to expect just goes to show they are not all the same if you found this review to be helpful at all please take a moment and click the button below to let amazon know thank you so much