RapidBrow®Â helps enhance the appearance of eyebrows.1 oz | CVS RapidBrow®Â Eyebrow Enhancing Serum is specifically created for eyebrows with an exclusive Hexatein® 2 Complex, a unique blend of fortifying proteins, stimulating peptides and nourishing ingredients designed to help condition, enhance, and improve the appearance of eyebrows as quickly as in 60 days.