<<Disclaimer: Verify this information before applying it to your situation.>> Thanks to all who replied. After posting I realized that I had meant to question the GF status of gelatin, too. Several people offered that not only is the liquid form of glycerin GF but, also, that gelatin is GF as long as the MSG is made in the U.S. Problems could arise if one is sensitive to MSG or if the source of MSG is outside the U.S. It was mentioned that a dry glycerin could contain gluten. Thanks, again Debbie/Arizona