Just registered for this forum to comment here... I have been taking l-tyrosine for appetite suppression, along with vitamin c in the morning to fight off an infection I am getting. It's been about 4 days and I noticed a significant decrease in my social anxiety. I did not know that l-tyrosine was supposed to help with anxiety, but when I looked around online that seemed to be the only change in my intake. The difference is absolutely amazing (like night and day, I have never had *any* other treatment for my anxiety, was always too anxious to go to a doctor about it, lol). Just wanted to put that little bit of anecdotal experience out there, for those who are saying it's just a placebo effect. Definitely not a placebo effect here, since I had no idea prior to taking it.