Our pepper mash and pepper puree contain 87-90% fresh peppers, 8-11% salt, and 1-3% vinegar. No preservative added to our chili pepper mash | pepper puree. Our Naturally occurring sulfites occur in many fruits, vegetables, fermented foods as well as fermented pepper mash/pepper puree. As we don’t add sulfites to our pepper mashes, they are not tested for sulfites. In the U.S., FDA labeling regulations do not require finished products to indicate the presence of sulfites in foods unless it has been added specifically as a preservative. Therefore, our retail mash labels say, “may contain sulfites”.