I had to stop taking this due to the effect it was having on my nervous system. It all started with tingling down my arms, and I couldn't sleep. I was totally restless. I had friends praying for me because I thought I was have a heart attack. But then I realized that the one thing that changed was in taking this supplement, so I stopped taking it, and within a day I was back to normal. Thinking that perhaps my system just couldn't take the recommended dosage, I tried taking just one pill, and I also varied the time by taking it one morning, and in each case I had the same effect. This supplement is definitely not for every man, be careful! Unfortunately, I am out of pocket with a full bottle of pills (minus about 8) that I cannot take.