What it is: Improve the appearance of brow volume with Biotin and cassia atala leaf extract.What it does: The clinically tested, gentle formula contains a custom blend of vitamins, plant extracts and rice protein, is suitable for sensitive skin, and feels comfortable on brows. Brows look healthier, natural and nourished over time. Plus, the wand features a flexible microbristle tip.Research results: A clinical assessment on 31 participants after 4 weeks of use revealed:- Hubba Brow brow enhancing serum improves the appearance of brow volume in just 4 weeks- Brows look fuller, healthier, natural, and nourished over timeA self-evaluation by 124 participants revealed:- 96% said brows look fuller after 12 weeks- 93% said brow hairs feel stronger after 12 weeks- 97% said brows feel conditioned after 12 weeksA self-evaluation by 129 participants revealed:- 93% said it improves the appearance of brows after 4 weeks- 92% said brows look healthier after 4 weeks- 96% said brows look nourished after 4 weeksHow to use: Apply nightly to clean, dry brows. Let dry before applying skincare products. 0.53 oz. Ophthalmologist tested Paraben-free; phthalate-free; sulfate-free; gluten-free; fragrance-free Made in France