Sulphites are preservatives that are added to some foods and drinks to prevent spoilage and maintain color. While they are naturally occurring in some foods, they are also added artificially. Some people are sensitive to sulphites, experiencing allergy-like or asthmatic reactions. It's important to note that reactions to sulphites are often referred to as a sensitivity rather than a true allergy, as they don't always involve the same immune system mechanisms. 

How Sulphites Affect People:

Sulphites can trigger a variety of reactions, particularly in people with asthma. Some common effects include: 

• Respiratory Problems: Wheezing, coughing, tightness in the chest, difficulty breathing, asthma attacks. This is the most common reaction.
• Skin Reactions: Hives, itching, rash, flushing.
• Digestive Issues: Nausea, vomiting, diarrhea, stomach cramps (less common).
• Headaches: Some people report headaches after consuming sulphites.

Foods and Drinks That May Contain Sulphites:

Sulphites are used in a variety of foods and drinks, including:

• Dried Fruits: Sulphites are often used to preserve the color of dried fruits.
• Wine: Red and white wines can contain sulphites, which are produced naturally during fermentation, and more may be added.
• Beer: Some beers contain sulphites.
• Processed Foods: Many processed foods, such as deli meats, sausages, and some canned goods, may contain sulphites.
• Vinegar: Some vinegars, especially balsamic vinegar, may contain sulphites.
• Fruit Juices: Some fruit juices, especially grape juice, may contain added sulphites.
• Restaurant Foods: Sulphites may be used in restaurant kitchens in various dishes.

Labeling:

In many countries, including the UK, food labels must indicate the presence of added sulphites above a certain level. Sulphites are often listed as sulphur dioxide (SO2) or by their specific name (e.g., sodium sulphite, potassium metabisulphite).  

Management:

The best way to manage sulphite sensitivity is to avoid foods and drinks known to contain them. Read labels carefully and be aware of potential hidden sources.

Diagnosis and Treatment:

If you suspect you are sensitive to sulphites, it's a good idea to consult with your doctor. While there isn't a specific test for sulphite sensitivity, they can help you identify triggers and manage symptoms. If you experience severe respiratory reactions, follow your asthma action plan (if you have one) and seek medical attention if necessary.