Instruct: Classify Amazon reviews into positive or negative sentiment
Query: yummy and NOT gluten free!!!

WARNING! I have Celiac's and must eat a gluten-free diet. I thought this was gluten free but Udi's makes a separate Certified Gluten Free Au Naturel Granola - be careful! It's super yummy but you must buy the gluten free because regular oats (not certified gluten free) are contaminated with gluten due to processing.