I have been using 'Great Hair' for over 5 years and recommend it highly. The assistant to my hair dresser Paul W. suggested Great Hair, because I wanted longer thicker hair. In 3 weeks I began to see the difference in my hair, within 2 days I felt the benefits of the other vitamins and minerals of this Great product. My hair is longer, thicker and stronger than it has ever been, and I LOVE IT. I have and will continue to recommend this product to anyone who is searching for longer, stronger locks and who can stand an EXTRA treat, a boost to your everyday vitamins...WOW.....