Some commercial egg substitutes can substitute for particular functions (potato starch and tapioca for water binding, whey protein or bean water for aeration or particle binding, or soy lecithin or avocado for emulsification). Food companies produce egg-free mayonnaise and other replacement foods. Alfred Bird invented egg-free Birds Custard, the original version of what is known generically as custard powder today.Most people find it necessary to strictly avoid any item containing eggs, including:

Ingredients that sometimes include egg protein include: artificial flavoring, natural flavoring, lecithin and nougat candy. Probiotic products have been tested, and some found to contain milk and egg proteins which were not always indicated on the labels. Prognosis
The majority of children outgrow egg allergy. One review reported that 70% of children will outgrow this allergy by 16 years. In subsequently published longitudinal studies, one reported that for 140 infants who had challenge-confirmed egg allergy, 44% had resolved by two years. A second reported that for 203 infants with confirmed IgE-mediated egg allergy, 45% resolved by two years of age, 66% by four years, and 71% by six years. Children will be able to tolerate eggs as an ingredient in baked goods and well-cooked eggs sooner than under-cooked eggs. Resolution was more likely if baseline serum IgE was lower, and if the baseline symptoms did not include anaphylaxis. Epidemiology
In countries in North America and western Europe, where use of cows milk based infant formula is common, chicken egg allergy is the second most common food allergy in infants and young children after cows milk.
Bacterial overgrowth of the small intestine can occur in chronic cases - presenting as malabsorption, diarrhea, and nutrient deficiencies - which may require the use of antibiotics. Presentation
Clinical features of IPO can include abdominal pain, nausea, abdominal distension, vomiting, dysphagia, and constipation. Symptoms depend on the portion of the gastrointestinal tract involved and the duration of symptoms. Symptoms may occur intermittently and over a prolonged period of time. It is not unusual for patients to present several times owing to the nonspecific nature of the symptoms. Conditions and onset will vary if the disease is primary vs secondary and the underlying disease (if a secondary manifestation) and its management. Symptoms indicative of advanced disease and possible intestinal failure include diarrhea, loss of appetite, sepsis, bloating, fatigue, signs of low volume status, and malabsorption including nutritional deficiencies and foul-smelling stools. Causes
In primary CIPO (the majority of chronic cases) the condition results from disruption of the intestines ability to move food. These can be broadly classified as myopathic (affecting the smooth muscle), mesenchymopathic (affecting the interstitial cells of Cajal), or neuropathic (of the nervous system) of the gastrointestinal tract.In some cases there appears to be a genetic association.