This energizing shampoo with aminexil and provitamins B5 and B6 reinvigorates hair from root to tip. Tested on a use group, 75% found their hair stronger and more invigorated.Contains 1.5% concentration of aminexil, a patented hair-loss molecule, which fights the collagen stiffening process.Use this much like a regular shampoo. Keep it in the hair for 5 or so minutes after you massage it into a lather. Then you can rinse it from your hair. This shampoo should be used for 4-6 weeks.