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The aim of this study was to evaluate the current well-being and dietary restrictions in children 6 years after food challenge-confirmed diagnosis of non-IgE cow's milk protein allergy, compared to peers with gastrointestinal symptoms but negative food challenge. This study aimed to evaluate the diagnostic process retrospectively.This is an Internet-based survey for mothers whose children underwent 6 years ago the double-blind, placebo-controlled food challenge for cow's milk (CM) because of gastrointestinal symptoms causing suspicion of non-IgE CM protein allergy. Concurrent dietary restrictions, overall well-being, medical history, and retrospective views on the food challenge were queried using a study-specific questionnaire, the Quality of life using PedsQL general score and parental stress with the Parenting Stress Index questionnaire.Mothers of 42 children (23 girls), median age of 6.7 years (range 5.7–8.6), participated in the survey, the response rate was 70%. All children now consumed cow's milk protein. The only food restrictions reported were empirical lactose-free diets in 7 children (17%). One-third of the children in both groups were presently reported to have eating-related issues such as picky eating. Quality of life was good and present parenting stress was average in both groups. The majority of the mothers (87%) felt positive or neutral about the food challenge performed in infancy.The non-IgE CM allergy with gastrointestinal symptoms diagnosed in infancy was a transient condition with good outcome. At an early school age, nearly all children have a good quality of life and a regular diet. The use of the double-blind, placebo-controlled food challenge was well-endorsed.