BROW BOOST DARK. Features: It all starts with science. Tinted eyebrow gel with cellulose fibers boosts volume + fullness both instantly and over time.. Buildable coverage gives you the power to create any look from natural to bold.. Revolutionary formula moisturizes and protects brows while adding volume with tinted renewable fibers.. Use this gel if you want to minimize thinning or sparse brows that lack color, volume and shape.. It's popular because its performs. Chosen 560,000 times!. Dermatologist developed. Rodan + Fields is the #1 Female Dermatologist-Founded Skin Care Brand in the U.S.**. Key Ingredients: Lash Boost Technology: Amplifies the appearance of fuller, thicker eyebrows over time. Castor Oil: Helps moisturize + condition for the appearance of fuller, thicker eyebrows. Cellulose Fibers: Visibly volumizes with natural, renewable fibers. Polymer Technology: Protects the surface of existing brow hair. Research Results: Clinically tested.. *Based on an 8-week U.S. clinical and consumer study:. 100% agree brows instantly look less sparse.. 93% Fuller-looking brows.. 90% Thicker-looking brows.. 90% More defined brows.. *Based on an 8-week US clinical and consumer study.. **Euromonitor International Ltd; Based on custom research conducted Nov-Dec 2024, Retail Value Sales for 2023, Definitions per Beauty & Personal Care 2024ed..