There is convincing proof that vitamin D 5000 IU daily will lower mortality and promote longevity. Likewise bacterially derived vitamin K ( menaquinone) has substantial anti-inflammatory effects that likely retard aging and combat multiple health issues. It is part of the cause for the French paradox. These are simple, nontoxic and cheap supplements that could benefit the whole world. Here are three references worth your time.
The risk of all-cause mortality is inversely related to serum 25(OH)D levels. J Clin Endocrinol Metab. 2012 Aug;97(8):2792-8. doi: 10.1210/jc.2012-1747. Epub 2012 May 30.
Vitamin K and vitamin D status: associations with inflammatory markers in the Framingham Offspring Study. Am J Epidemiol. 2008 Feb 1;167(3):313-20. Epub 2007 Nov 15.
Dietary intake of vitamin K is inversely associated with mortality risk. J Nutr. 2014 May;144(5):743-50. doi: 10.3945/jn.113.187740. Epub 2014 Mar 19.