In Canada, “sulphites” refers to a group of sulfur-based food additives, including sulfurous acid and its’ salts, used as preservatives to maintain food colour and prolong shelf life. While generally safe for most consumers, sulphites can trigger allergic-like reactions in a small percentage of individuals. Sulphites are naturally occurring in some foods, such as canned or dried fruit, deli meats, condiments, fish, tomato paste, vinegar, and dried herbs, In Canada, sulphites are required to be labelled when added as an ingredient or component to a food at any level, with a few exceptions for ingredients that are exempted from declaring all their
components. The allowable levels of sulphites that can be added to wine range around the world. In the E.U., the limits are 150 mg/L for red wine, and 200 mg/L for white and rosé wines. In the U.S., the maximum allowable added amount is higher; 350 mg/L. Australia is slightly lower, with 200 mg/ L. These can vary when discussing organic wines. For example, under
Canadian organic regulations, the maximum allowable amount of added sulphites is only 45
mg/ L.