HELP FOR THINNING BROWS Clogged eyebrow follicles often result in hair growth being slowed down or sometimes even completely stopped. This highly concentrated serum gently cleanses and dissolves dead skin cells to encourage new growth. Simply brush on twice a day and start seeing fuller, thicker brows in as little as 4 to 6 weeks. Hypoallergenic, non-comedogenic. .33 fl. oz.