The rootist BioBrew Fermented strengthening Serum is one of my favorite hair serum of all time . I recently started using it and I am obsessed with the product and its formula . I always try to use styling tools and the heat kind of damaged my hair and also I have big concern of frizzy hair . But after using The rootist BioBrew Fermented strengthening Serum I felt the difference in my hair . It works magically for my hair . I have thick dark brown hair . I love the packaging of the product it's so cute and unique colors . It have really nice and fresh smell . I really enjoy using The rootist BioBrew Fermented strengthening Serum . I highly recommend this for those who uses heated tools for hair styling because that can damage our hair alot . **This review was collected as part of a promotion.