I did not expect what a new Cochrane writes on the prevention of nutritional rickets in term born children — Cochrane Database Syst Rev. 2007 concludes
There a only few studies on the prevention of nutritional rickets in term born children. Until new data become available, it appears sound to offer preventive measures (vitamin D or calcium) to groups of high risk, like infants and toddlers; children living in Africa, Asia or the Middle East or migrated children from these regions into areas where rickets is not frequent. Due to a marked clinical heterogeneity and the scarcity of data, the main and adverse effects of preventive measures against nutritional rickets should be investigated in different countries, different age groups and in children of different ethnic origin.
May I summarize: 1. only a few studies; 2. vitamin D OR calcium and 3. to high risk kids only. This looks different to what Nestlé manufactures at the moment.