I have had CFS for over twenty years and I found tryptophan to be helpful. Since it was discontinued in this country I haven't found anything that eases muscle pain and helps with restful sleep...except some prescription meds that are hard for me to tolerate. I do take Motrin. I tried 5HTP but it wasn't as helpful. Is there another source for tryptophan that I missed. It is good to find others who know what this 'chronic crud' feels like... Thanks.