Bests & Worsts Reviews from Amazon

CAUTION - use cautiously, consult a physician, and do your research before using ANY supplement. I felt that I had researched this product thoroughly - read everything I could find on the Internet as well as reviews - and thought it would be safe to take. I was wrong!!!! For the first four days, I felt great. Had increased mental focus and no side effects. By day 5, I became incredibly irritable and easly agitated. I did not take a dose that day. By day 6, I had a melt down like I have never experienced before. I went into a complete rage for no reason, freaked out, cried, threatened suicide, freaked my family out completely. I had no control over my emotions and, even though logically I knew I was acting irrationally, I couldn't stop. For the next day and a half, I continued to be easily agitated over small things, felt basically angry at everything with bouts of crying. Felt sort of detached like I didn't know what was happening - like in a dream state. 3-1/2 days after I had stopped taking this supplement, it was like someone hit a switch and I was back to normal. This was the scariest experience for me. I thought I was literally losing my mind. After doing some further research I have found a few other people that this has happened to. I have also discovered that both dopamine and norepinephrine (which are the chemicals that this amino acid helps produce) do have significant implications on your body including increased heart rate and increased blood pressure. In addition, too much norepinephrine can cause prolonged bouts of anxiety, restlessness, IRRITABILITY, increased heart rate, and panic attacks. I was only taking one capsule (500 mg) per day but evidently that was too much for me. As everyone is different and their bodies will react differently, this reaction will not be typical but I wanted to warn people to be careful as you never know what a supplement will do to you or how it will affect your brain chemistry.