Multiple bone fractures in an 8-year-old child with cow's milk allergy and inappropriate calcium supplementation.

The case of an 8-year-old boy with severe bone mass reduction and 4 fractures as a result of an unsupervised diet established to treat cow's milk allergy is presented. Endocrine, genetic and orthopedic pathologies were excluded. While vitamin D intake had always been appropriate, his calcium intake had been inadequate for many years. This clinical report suggests that both vitamin D and calcium supplementation are necessary when a cow's milk protein-free diet is prescribed, even when a hypo- or non-allergenic formula is provided.