Feeding challenges in children such as functional gastrointestinal disorders (FGID) are a common problem accompanying the child's development. Constipation is the only FGID for which pharmacological interventions are recommended. Other FGID are commonly self-limiting or can be managed with non-pharmacological interventions as for regurgitation and reflux or infantile colic. Diarrhoea can be either a FGID (if it is functional) or acute (often caused by acute gastroenteritis). Other feeding challenges include food allergies such as lactose intolerance and deficiencies like iron deficiency – the most common micronutrient deficiency worldwide.