Hello, I am a nurse in the hospital and as such, high-stress levels are something I have grown used to. After the stress started to cause hair loss, I began taking Pro-Form Endure for 6 months. The product began to work consistently after 3 months. The product stopped the hair loss instantly and the hair began to grow. I am very satisfied with the product and decided to it with my friends battling the same issue, especially since I had no side effects.