While herbs, salt, olive oil and other natural preservatives have been used throughout history to extend the life of food, today's preservatives are often chemically manufactured. One example is potassium bisulfite, which is used to preserve foods and drinks. While potassium bilsulfite is an approved preservative, it is considered one of the most allergenic food preservatives.
Significance
Potassium bisulfite belongs to the sulfite group of preservatives. Sulfites are characterized by containing sulfur and oxygen, according to Diet.com. Potassium bisulfite is also referred to as potassium metabisulfite. This preservative is found naturally in wine. Known as an antioxidant preservative, potassium bisulfite has some antioxidant capabilities, meaning it can fight inflammation-causing free radicals in the body.
Regulation
The Food Standards Agency has approved potassium bisulfite for use as a food additive, assigning it an "E number" of E224, according to the agency's website. You may find this number in an ingredients listing instead of potassium bisulfite's full name. This means the preservative has been approved for use in manufacturing and that the agency has determined how it can be safely used.
Uses
Potassium bisulfite has been approved as an anti-caking, firming and glazing agent, according to the World Health Organization's Codex Alimentarius, a food regulatory agency. Potassium bisulfite also is added to dried apples and dehydrated potatoes to preserve their edibility. Potassium bisulfite also is added to wine, not only as a preservative, but also to reduce wine browning and promote clarity, according to Steve Bader, winemaking expert and owner of Bader Beer & Wine Supply.
Inappropriate Use
Potassium bisulfite should not be used to preserve certain types of foods. The United States Food & Drug Administration prohibits its use for preserving raw fruits and vegetables. Potassium bisulfite can be used on fruits intended for dehydration or canning.
Warning
In some instances, potassium bisulfite has been shown to cause allergic reactions in humans. Those with asthma or who are allergic to aspirin are particularly at risk, according to Diet.com. If you are consuming foods or beverages that contain this preservative and experience allergic reaction symptoms, such as rash, difficulty breathing or swelling of the mouth and tongue, discontinue consumption of these foods and speak to your physician about diagnosing allergies to potassium bisulfite and other preservatives.
Member Comments