- Want thicker, fuller brows? GrandeBROW is an eyebrow enhancing serum that promotes fuller and thicker brows in 6-8 weeks. GrandeBROW serum’s blend of vitamins, peptides and amino acids conditions brow hairs for a healthy and restored look. Grande Cosmetics introduces a unique soft-tip brush that is carefully designed to deliver product to the brows and sparse areas. See fuller results in 4 months. After cleansing your face, apply GrandeBROW to the thinning areas of your brow before bed. Make sure to apply GrandeBROW along the natural shape of your brows. Beauty Tip: Best when used with GrandeBROW-Fill