
FPIES (Food Protein Induced Enterocolitis Syndrome)
What is FPIES? Food protein induced enterocolitis syndrome (FPIES) is a severe form of non-IgE mediated food allergy. How does...
FPIES and Complementary Feeding | Allergy UK | National CharityYour baby has been diagnosed with Food Protein Induced Enterocolitis Syndrome (FPIES), which is a non-IgE mediated food allergy, and you have been advised that your baby needs to avoid the allergen that caused the reaction.
The introduction of solid foods should not be delayed beyond 6 months of age in FPIES, as babies need to be exposed to a variety of tastes and textures to prevent nutritional deficiencies, poor growth and fussy eating. However, this may feel daunting for you as there are no tests that can predict if your baby will react to any other food/s.
The most common foods that cause FPIES are cow’s milk, egg, fish, soya, oats and rice. But almost any food can trigger a reaction, including foods considered to be early weaning foods such as fruits and vegetables. However, it is important to remember that the majority of babies will react to only one food. It is much less common to react to two, and extremely rare to react to three or more.
If your baby has an FPIES reaction, they should be referred to an allergy service and be under the care of a specialist dietitian.
There is no need to stop breastfeeding or to exclude foods from your diet unless your baby reacted to a food through your breastmilk, this is very rare. If you wish to stop breastfeeding before your baby is 1 year of age, and they have cow’s milk FPIES, speak to your doctor or dietitian about a suitable milk-free formula.
Soya formula is not recommended for babies under 6 months of age and should only be given to babies over 6 months once soya tolerance has been established.
If your baby has an FPIES reaction within 1-4 hours of eating i.e. repeated vomiting, goes pale or limp, seek medical help. It will help if you can present your emergency FPIES letter. Speak to your doctor if you have not been given a letter.
If your baby has any other type of reaction to food within 2 hours of eating i.e. lip swelling, hives, vomit, stop giving the food and contact your doctor. If there is difficulty in breathing or reduced conscious level, seek immediate medical help.
The table on the next page gives a suggestion of how to progress weaning based on current data of trigger foods for FPIES. Start with the foods listed as uncommon trigger foods. Introduce foods one by one in each column moving from uncommon trigger foods to more common trigger foods.
If your baby reacts to a food in a particular food group, discuss next steps with your doctor or dietitian, before moving on with that food group.
| Ages and stages of weaning | Food types | Uncommon trigger foods -> More common trigger foods | ||
| 6m exclusive breastfeeding (Dept. of Health)
4 months+ Purees / well mashed foods of lower risk veg, fruits and grains. Then move on to iron rich proteins.
7-9 months Mashed foods with soft lumps and soft finger foods e.g. cooked vegetables, soft fruits
9-12 months Mashed, chopped and minced family meals and finger foods
| Milk / formula
| Cow’s milk and diary, soya* | ||
| Vegetable | Parsnip, spinach cauliflower, broccoli, tur- nip, swede, courgette | Carrot, potato, tomato, green bean, butternut squash, pumpkin | Sweet potato, green pea | |
| Fruit | Plum, blueberries, apricot, peach, strawberries, watermelon | Apple, pear, mango, orange, kiwi, melon | Banana, avocado | |
| Grains | Quinoa, millet, amaranth | Cornmeal/polenta, wheat, barley | Rice, oat | |
| Iron rich protein | Lamb, pork | Beef, legumes, beans, lentils, chickpeas | Fish, egg, soya, poultry e.g. chicken, turkey, duck | |
| Nuts and seeds** | Smooth tree nut (i.e. almond, hazelnut, cashew, walnut) and seed butters | Smooth peanut butter | ||
| Other | Coconut based yoghurt/cheese | |||
*If your baby has cow’s milk FPIES do not introduce soya and discuss it with your doctor / dietitian
** Nut and seed butters can be stirred into your baby’s food or mixed with a little of your baby’s usual milk. Introduce each nut butter or seed butter separately starting with ¼ teaspoon then ½ teaspoon, then 1 teaspoon. Once introduced, leave in the diet and introduce the next nut or seed. Aim for 1-2 teaspoon of each nut or seed butter/ground nut or seed a week.
If your baby has difficult to manage eczema, and/or immediate/IgE allergy to egg or other foods, seek advice from your doctor about when it would be appropriate to introduce nuts and seeds.
With thanks to FPIES UK for kindly donating the content and resources that contributed to this factsheet. Their support has helped us provide accurate information and guidance for those affected by FPIES.

What is FPIES? Food protein induced enterocolitis syndrome (FPIES) is a severe form of non-IgE mediated food allergy. How does...

What is FPIES? Food protein induced enterocolitis syndrome (FPIES, pronounced F-pies) is a severe form of non-IgE mediated food allergy....