What it is: A revolutionary brow enhancing serum that promotes the appearance of fuller, bolder looking brows in six to eight weeks, with full improvement in as little as four months.Highlighted Ingredients: - L-Proline: An amino acid essential to healthy, fortified brows.- Hyaluronic Acid: Conditions, protects, and hydrates brows.- Glycosaminoglycan: Locks in moisture for conditioned, healthier-looking brows.Ingredient Callouts: Free of phthalates. This product is also cruelty-free and comes in recyclable packaging.What Else You Need to Know: Infused with vitamins, antioxidants, and amino acids, this serum is ideal for enhancing sparse or thinning brows.