From Skin Research Laboratories, this potent serum is formulated with an exclusive Dual-Weight Protein Complexâ"¢ 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, a proprietary combination of amino acids, help rejuvenate the brows, enhancing their overall appearance.Biotin, a
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