The manuscript entitled "Potential for cost-saving prevention of more than 30,000 cancer deaths per year by vitamin D supplementation of the older adult population in Germany" is generally well written and contains valuable points, but there are a few points that answering it can clear up some ambiguities.
1.Why all the search is limited to two search engines, while the Cochrane Library, Scopus, and Web of Science sites could help you find more studies?
2.Please Mentioned the heterogeneity of the results from the included meta-analysis studies in your manuscript.