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Association between vitamin D supplementation and mortality: systematic review and meta-analysis

BMJ 2019; 366 doi: (Published 12 August 2019) Cite this as: BMJ 2019;366:l4673

Reduced cancer deaths at the cost of ?

Dear Sir,
Interesting meta-analysis where Vitamin D supplementation alone was not associated with all cause mortality in adults compared with placebo or no treatment. Vitamin D supplementation reduced the risk of cancer death by 16%.
If all cause mortality was same but cancer mortality was reduced by 16% in Vit D group, it means there was some other means of increased death by 16% in the Vit D group.
Authors did not mention that.

Competing interests: No competing interests

13 August 2019
Ramakant Sharma
Chandler, USA