Everyone has their favorite product, but our award-winning, Deep-Penetrating Reconstructor has a loyal following that s truly unparalleled. The reason? In just five minutes (The 5-minute miracle!), this powerful combination of amino acids rebuilds and re-fortifies stressed strands returning hair to its former glory in a single application. Perfect choice for: Hair of any texture, length, or thickness that s become damaged, dry, and dull, thanks to relentless exposure to thermal styling tools, chemical processes, or a harsh environment. Here s how: Apply to damp, towel-dried hair; allow to penetrate for a full five minutes; then rinse. (Tip: Leave on even longer for an added treat for your hair your hair will thank you for it.) You ll feel the difference before you even pick up your blowdryer. The inside secret: We added the highest concentration of Quadramine Complex, our famous protein-stocked repair formula, to maximize protection and reconstruction to each and every damaged strand.