I recently bought and started taking 400mg of l theanine to help with my anxiety and also brain fog.
I believe it has worked over the last few days of me taking it. I don’t feel as panicked even though I still get some typical panic attack symptoms.

However, having anxiety, I’m worried about the safety of it long term. I seen someone mention on a post that it is like a “death sentence for your brain”.

Am I better off taking matcha green tea as an alternative so that the dosage isn’t as high?

DAE here use l theanine?