Stir-frying may not cook vegetables sufficiently to prevent symptoms. Steaming and microwaving are good methods and help to preserve the vitamin C content. Sufficient heat alters the protein’s shape and reduces the risk of a reaction. Most people can tolerate cooked or tinned versions of the fruits/vegetables which cause symptoms. Often you only need to avoid these in raw form. Only exclude those plant foods that you react to. Seek allergy testing and a dietetic referral for tailored advice if you have reacted to soy products. They can be associated with severe symptoms, but small amounts of soy in bread, soy sauce and sausages are often tolerated. Soy milks have high levels of one of the common allergens that trigger PFS. nuts) but you should seek advice from your allergy centre if you have unexplained or severe symptoms. Most people with PFS do not need to avoid traces (e.g. This will also identify your risk of a severe reaction and how strict avoidance needs to be. If you react to nuts further testing will help to identify which proteins are involved. Severe symptoms include difficulty breathing, wheezing, nausea, vomiting, urticaria (hives or nettle rash) and significant swelling.
You get severe reactions or react to nuts or soya.Seek an allergy referral as you may not have PFS and may have a different plant allergy called LTP allergy. Symptoms occur with tinned or adequately cooked plant foods.Especially if you have a plant-based, vegan or vegetarian diet. If you are concerned that your diet is not varied and you are at risk of deficiencies, ask your GP to do a micronutrient screen and seek the advice of a specialist allergy centre and dietitian. The average number of plant foods avoided in PFS is around four. If you are allergic to many types of pollens – tree, grass and weed you may find you also react to a wide range of plant foods. Seek advice from your GP and ask for a referral to a specialist allergy centre if: High street allergy tests are unreliable and the dietary advice can be overly restrictive. in protein supplements or drinks used by body builders. You may also need advice if you are vegan, vegetarian, following a plant-based diet or taking plant-based supplements based e.g. If you are planning to become pregnant this is a particularly important nutrient and you may wish to get support from a dietitian. based on pea or soya proteins.įruits and vegetables are a good source of fibre and micronutrients, including folate. These include smoothies, juices, soy/nut milks or nutritional supplements e.g. There is an increased risk of more severe reactions with concentrated sources of plant allergens. Symptoms are usually mild and triggered by only a few raw fruits and/or vegetables. Most people with PFS can tolerate cooked versions of fruit and vegetables.
PFS is more common in adults but can also affect children and teenagers. Symptoms are usually mild but PFS can result in anaphylaxis (1.7% of reactions). PFS is sometimes called a secondary allergy. Pollen is the primary trigger and causes a cross-reaction to plant foods. Peeling vegetables like potatoes can also result in itchy hands/eyes and sneezing. If you have PFS, this may cause itching and swelling of the lips and mouth soon after eating. Plant proteins found in raw fruits and vegetables, soy and nuts have a similar shape to the pollen proteins. This triggers the symptoms of hayfever - itchy, watery eyes and sneezing. PFS affects your immune cells, which recognise the shape of proteins in tree, grass and weed pollens. Your symptoms could include itching and tingling of the lips, mouth and throat. Symptoms occur soon after eating raw fruits and/or vegetables. It is also known as oral allergy syndrome. It affects around 2% of the UK population. Pollen food syndrome (PFS) is usually associated with hayfever (allergic rhinitis).
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