Which Of These Foods "glutened" Me?! in Coping with Celiac Disease Posted October 24, 2007 · Report to Admin I don't know about anyone else but I get severe headaches every single time I drink a pumpkin spice latte from Starbucks. I know they supposedly are gluten-free but it never fails with the headaches, and a throbbing, unrelenting headache is for me THE unmistakeable sign of being glutened. I don't know. If S-bucks can guarantee this drink is gluten-free, maybe it's a caffeine sensitivity? But other types of caffeinated drinks from S-bucks seem to be fine. Could there be something in different drink syrups? I can't seem to have other flavoured drinks from there either like the cinnamon dolce latte but the regular latte is fine.... argh!