The advice here is primarily written for parents of a child with a food allergy. However, most of it is also relevant if you are an adult with a food allergy.

Your child’s diet

There is no cure for food allergies, although many children will grow out of certain ones, such as allergies to milk and eggs. The most effective way you can prevent symptoms is to remove the offending food (known as an allergen) from their diet.

However, it's important to check with your GP or the doctor in charge of your child’s care first before eliminating certain foods.

Removing eggs or peanuts from a child's diet is not going to have much of an impact on their nutrition. Both types of these are a good source of protein, but can be replaced by other alternative sources.

A milk allergy can have more of an impact as milk is a good source of calcium, but there are many other ways you can include calcium in your child’s diet, including green leafy vegetables.

Many foods and drinks are fortified with extra calcium.

If you are concerned that your child’s allergy is affecting their growth and development, see your GP.

Reading labels

It's very important to check the label of any pre-packed food or drinks your child has, in case it contains ingredients they are allergic to.

Under EU law, any pre-packed food or drink sold in the UK must clearly state on the label if it contains the following ingredients:

• celery
• cereals that contain gluten (including wheat, rye, barley and oats)
• crustaceans (including prawns, crabs and lobsters)
• eggs
• fish
• lupin (lupins are common garden plants, and the seeds from some varieties are sometimes used to make flour)
• milk
• molluscs (including mussels and oysters)
• mustard
• tree nuts – such as almonds, hazelnuts, walnuts, brazil nuts, cashews, pecans, pistachios and macadamia nuts
• peanuts
• sesame seeds
• soybeans
• sulphur dioxide and sulphites (preservatives that are used in some foods and drinks) at levels above 10mg per kg or per litre

Some food manufacturers also choose to put allergy advice warning labels (for example, "contains nuts") on their pre-packed foods if they contain an ingredient that is known to commonly cause an allergic reaction, such as peanuts, eggs or milk.

However, these are not compulsory. If there is no allergy advice box or "contains" statement on a product, it could still have any of the 14 specified allergens in it.

Look out for "may contain" labels, such as "may contain traces of peanut". Manufacturers sometimes put this label on their products to warn consumers that they may have become contaminated with another food product when being made.

Read more detailed information about allergen labelling on the Food Standards Agency website.

Some non-food products contain allergy-causing food:

• Some soaps and shampoos contain soy, egg and tree nut oil.
• Some pet foods contain milk and peanuts.
• Some glues and adhesive labels used on envelopes and stamps contain traces of wheat.

Again, read the labels of any non-food products that your child may come into close physical contact with.

Unpackaged food

Currently, unpackaged food doesn't need to be labelled in the same way as packaged food. This can make it more difficult to know what ingredients are in a particular dish.

Examples of unpackaged food include food sold from:

• bakeries (including in-store bakeries in supermarkets)
• delis
• salad bars
• "ready-to-eat" sandwich shops
• takeaways
• restaurants

If you or your child have a severe food allergy, you need to be careful when you eat out.

The following advice should help:

• Let the staff know. When booking a table at a restaurant, make sure the staff know about your child’s allergy. Ask for a firm guarantee that the food you or your child is allergic to won't be in any of the dishes served. The Food Standards Agency (FSA) offers chef cards that provide information about your child’s food allergy, which you can give to restaurant staff. As well as informing the chef and kitchen staff involved in cooking your food, let waiters and waitresses know so they understand the importance of avoiding cross-contamination when serving you.
• Read the menu carefully and check for "hidden ingredients". Some food types contain other foods that can trigger allergies, which restaurant staff may have overlooked. Some desserts contain nuts (such as a cheesecake base) and some sauces contain wheat and peanuts.
• Prepare for the worst. It's a good idea to prepare for any eventuality. Always take your child’s anti-allergy medication with you when eating out, particularly if they have been given an auto-injector of adrenalin (read more about treating food allergies with a auto-injector).
• In older children, you can use what is known as a "taste-test". Before your child begins to eat, ask them to take a tiny portion of the food and rub it against their lips to see if they experience a tingling or burning sensation. If they do, it suggests that the food will cause them to have an allergic reaction. However, the "taste-test" doesn't work for all foods, so it shouldn't be used as a substitute for the above advice.

The FSA has produced a factsheet about buying food and eating out with a food allergy (PDF, 220kb).

Further advice

Here is some more advice for parents: 

• Notify your child's school about their allergy. Depending on how severe your child’s allergy is, it may be necessary to give the staff at their school an emergency action plan in case of accidental exposure. Arrange for the school nurse or another staff member to hold a supply of adrenalin. Food allergy bracelets are also available, which explain how other people can help your child in an emergency.
• Let other parents know. Young children may easily forget about their food allergy and accept food that they shouldn't have when visiting other children. Telling the parents of your child’s friends about their allergy should help prevent this.
• Educate your child. Once your child is old enough to understand their allergy, it's important to give them clear, simple instructions about what foods to avoid and what they should do if they accidentally eat them.