Im sure there would be info about l tasurine on the net, simply type it into google
I take fish oil capsules for artritus, heart and so on
anxiety sufferers often get a very strong placebo effect from any of these so called food suppliments, so it can be hard to know whether theres any actual help
I would avoid the very expensive ones with miracle claims an the more expensive and extravagent the claims, the better usually is the placebo effect