<<Disclaimer: Verify this information before applying it to your situation.>> HI everyone, It seems that most people on this list who use this product tend to take in between 500mg to up to 10 grams per day using pure L-glutamine powders & in some cases capsules. Overall people reported very positive results in using this product. Particularly those who took 2-3 small servings spread out through the day. One poster did give me the url to this archived message which tends to share some bad light on L-glutamine. http://maelstrom.stjohns.edu/CGI/wa.exe?A2=ind0303D&L=celiac&P=R1471 As for myself, I have increased my dosage of L-glutamine to 10 grams a day. I'll give it a fortnight & hopefully I will be fortunate enough to notice some improvements using it at this level. Cheers. *Please provide references to back up claims of a product being GF or not GF*