I purchased my first 2 bottles of hairfinity in April of 2014. Since then, I have only bought 2 more bottles and I am still on the 4th bottle as I write this. My before pic shows my hair before I started using hairfinity and my after was taken January 1st of this year, 2016. I take hairfinity off and on because I feel my hair grows out of control when I take them everyday. If this is my results after only using 4 bottles in 2 years, imagine what it would be if I used a bottle a month!! I love it