I took it for about 6 months straight...I felt a difference initially in recovery and really liked it, but it seemed to lose its strength after a few months. I assumed perhaps I was on it too long and desensitized to it, so I took a break. Unfortunately, it never did work the same when I went back to it. I tried megadosing and it did work well again, but I'd go through a bottle a week at that dose so I just quit when it ran out.