Professional Ask Dr. JL-Theanine Uses of L-Theanine and should we supplement with it? JWelton On this episode of “Ask Dr. J” Dr. Russell Jaffe is asked about the uses of L-Theanine and if we should supplement with it.Share this: Share on Facebook (Opens in new window) Facebook Share on X (Opens in new window) X Share on Pinterest (Opens in new window) Pinterest Share on LinkedIn (Opens in new window) LinkedIn Share on Reddit (Opens in new window) Reddit