LiBrow Eyebrow Stimulating Serum. LiBrow Purified Eyebrow Serum was developed by the same doctor who brought LiLash to life. Formulated for anyone who wants to restore the splendor and definition of thin, aged or excessively plucked brows. For this reason, LiBrow has become the best ally to recover the beauty of the eyebrows, the framework of a perfect look. Safe for sensitive skin. Without chemical colorants. Without parabens. Soft enriched botanical tint. Cruelty free.