I've written a healthy bit on the enormous benefits of vitamin K2 (MK-4) Menatetrenone. To access those posts, click here. Via Dr. Eades' excellent Twitter feed, I just got wind of this study on K1 (Phylloquinone) and its ability to modestly slow the progression of coronary artery calcium ("CAC" - 6% less progression than the control). Conclusions: Phylloquinone supplementation slows the progression of CAC in healthy older adults with preexisting CAC, independent of its effect on total MGP concentrations. There's also a media writeup on the affair. Let's probe. Speaking to NutraIngredients.com at the recent Vitafoods show in Geneva, vitamin K expert Professor Cees Vermeer from VitaK at the University of Maastricht explained that matrix Gla protein (MGP) in the vessel walls is a hot topic. “It is the most powerful inhibitor of soft tissue calcification presently known, and it definitely needs the vitamin K to be active in that way. So, vessel walls have only MGP to defend themselves against calcification,” he said. So, what's "MGP," or, matrix gla protein? Lets close the loop, and Wikipedia will do just fine. Matrix gla protein (MGP) is a protein found in numerous body tissues that requires vitamin K for its optimum...