I noticed on one site that l-theanine can affect your thyroid. Since I have had my thyroid removed & take 75 mg of synthroid as a replacement, I am concerned about the safety of taking l-theanine with the synthroid. Has anyone taking synthroid had a problem with taking l-theanine?
Did you ever find an answer to your question? I wanted to try L-theanine for anxiety because I do not want to take benzos, but am concerned about using it when I take levothyroxine daily. I cannot seem to find any information about it when I research L-theanine and levothyroxine sites..
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