Have always been skeptical of this, but I bought a bottle of it in pill form. Last night I had a killer leg workout that was more intense than any I have had in a long time. I could barely walk when I got home last night because my legs were so weak so I figured what the heck and took a couple. This morning I woke up expecting the worse and just a little bit of soreness and thats it. I actually ran 2 miles before work. I was pleasently shocked with how quickly I was able to recover using this.