OLAPLEX BROWBOND Building Serum promotes the look of fuller, denser, more defined eyebrows in as little as 4 weeks,¹ sculpts without stiffness, and is formulated with an innovative peptide to help reduce the appearance of new greys.² Ophthalmologist & dermatologist tested. Prostaglandin free. ¹Results will vary. As reported by 30 participants in a consumer perception clinical study after 4 weeks of 2x daily use. ²Tested on scalp hair. Scalp hair and brow hair gray the same way.