<<Disclaimer: Verify this information before applying it to your situation.>> Dear Listmates, I want to caution recovering celiacs like me that I had a bloating reaction to Best Foods mayo; I've been having problems with fat intake although I only used a tbsp. of mayo. I called the company and the spokesperson said that the company makes every effort or attempt to ensure that their "natural flavors" from other suppliers do not contain common allergens. I'm not a lawyer but I know that effort or attempt does not constitute absolute assurance. And technically, gluten to a celiac is not an allergen but a toxic protein. As for their vinegar, she said it was distilled but couldn't assure me that it was actually derived from corn. She said that if the vinegar was from wheat, it would say in "parentheses" next to the word vinegar. If you have anymore questions, you can contact Best Foods at 1-800-338-8831. Laura