What it is: A brow-enhancing serum that improves the appearance of brow volume in as little as four weeks.Highlighted Ingredients: - Provitamin B5: Conditions and improves brow-hair sheen. - Biotin and Cassia alata Leaf Extract: Improve the appearance of brows.Ingredient Callouts: Free of parabens, phthalates, sulfates SLS & SLES, and contains less than one percent synthetic fragrance. It is also gluten-free.What Else You Need to Know: This serum is clinically shown to improve the look of brow volume in as little as four weeks and promote fuller-looking brows in as little as 12 weeks. Infused with a blend of vitamins, plant extracts, and rice protein, the sensitive-skin-friendly formula does not contain prostaglandin (or its derivatives).Clinical Results: In a self-evaluation by 124 participants, after 12 weeks:- 96% said brows looked fuller- 93% said brow hairs felt strongerIn a self-evaluation by 129 participants, after 4 weeks:- 93% said it improved the appearance of brows