I couldn't find a thread on this.
Currently, I am using the Enzymatic Therapy brand of L-theanine. http://www.iherb.com...sules/2228?at=0
Unfortunately, ConsumerLabs has no analysis of L-theanine supplements. However, a few other of Enzymatic Therapy's products have failed on their tests.
I am wondering what brand names there are that I can trust to be pure and contaminant-free.
If there is such a brand, I would also like to know why such brand is trusted to be pure and contaminant-free.
Thanks.