Rapid Brow Eyebrow Enhancing Serum® is an innovative eyebrow enhancing that conditions, restores & repairs the appearance of eyebrows in as quickly as 60 days. Clinically proven, up to 108% improvement in the appearance of eyebrow density in just 60 days * Rapid Brow Eyebrow Enhancing Serum® is formulated with an innovative Hexatein™2 Complex which gives you visibly fuller-looking, thicker-looking & less sparse eyebrows. Exclusive to Rapid Brow Eyebrow Enhancing Serum®, Hexatein™2 Complex is comprised of six highly effective ingredients that help condition & improve the appearance of eyebrows & put the wow back into your brow! More voluminous-looking, more beautiful natural brows are just a few brush strokes away! *A clinical study of 61 subjects over 90 days.