Vitamin K (phytonadione) is well known for its role in strengthening the bones and blood clotting as one of the first lines of  immune system defense. Recently, vitamin K was found to play a role in regulation of Interleukin-6, a cytokine involved in regulating inflammation and a good number of bio-markers of aging (1, 2). Vitamins K supplements are best used in all-in-one formulations with supporting nutrients, especially fats, as Vitamin Ks are fat soluble. Sources are green leafy vegetables.

1.  Daming Chen. Et. Al., Journal of Virology, Human Herpesvirus 8 Viral Interleukin-6 Interacts with Splice Variant 2 of Vitamin K Epoxide Reductase Complex Subunit 1, 11/30/2011.

2.  Shea MK, Et. Al., Vitamin K, circulating cytokines, and bone mineral density in older men and women. Am J Clin Nutr. 2008 Aug;88(2):356-63.