Hubba Brow Brow Enhancing Serum - Benefit Hubba Brow Serum improves the appearance of brow volume in just 4 weeks* and shows fuller-looking brows at 12 weeks**. 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.FeaturesImprove the appearance of brow volume in just 4 weeks*Clinically tested, gentle, and suitable for sensitive skinOphthalmologist-testedDoes not contain prostaglandin or its derivativesNon-comedogenicBrows look fuller, healthier, natural, and nourished over time*Clinical assessment on 31 participants after 4 weeks of useKey IngredientsProvitamin B5 helps condition and improve the sheen of brow hairDoes not contain parabens, phthalates, sulfates, fragrance, or gluten ingredientsBiotin & cassia alata leaf extract help improve the appearance of brow hairResearch Results92% said brows look healthier after 4 weeks*****Self-evaluation by 124 participants*Clinical assessment on 31 participants after 4 weeks of use97% said brows feel conditioned after 12 weeks**93% said it improves the appearance of brows after 4 weeks***Results may vary96% said brows look nourished after 4 weeks***96% said brows look fuller after 12 weeks**93% said brow hairs feel stronger after 12 weeks*****Self-evaluation by 129 participants - Hubba Brow Brow Enhancing Serum