i cant tolerate l-theanine , Llmd told me to take it. I have comt and knew it could ne a problem for me as other methyl donors are. I tried and failed miserably. My lllm said this happened cause i have L BBB. One weird thing gaba doesn't do anything for me. I haven't taken it in a while but i do take kaviance which has gaba and it doesn't do anything... Also my Llmd recommended i take APEX resvertrol. thoughts?