Growth treatment fortifies and protects short nails. What it is: Growth treatment that defends and improves your nails so they can grow. How it Works: Our triple-protein and silk formula instantly reinforces soft, weak or thin nails. Helps fortify nails, protecting from breaking and splitting. The Results: Visibly longer nails in just one week! Salon tested. sallyhansen.com. America's No. 1 nail brand. Made in USA.