Neubrow from Skin Research Laboratories, is a potent serum Formulated with an exclusive Dual-Weight protein complex that replenishes and protects the brows, promoting strength suppleness and shine. It delivers fuller-looking, more defined eyebrows in three to four weeks. Formulated with moisturizing keratin to support sparse, undernourished and aging brows. Bioengineered polypeptides and a proprietary combination of amino acids help rejuvenate the brows, enhancing their overall appearance. Ophthalmologist and dermatologist tested. Clinically Proven Safe, gentle and effective. Fragrance-free and paraben-free.