Vitamin K2 may help prevent cardiovascular disease by preventing and even decreasing calcium deposition into arteries, thus making arteries less stiff. GABA, which can be increased by the herb passionflower, may work to combat anxiety and aid in sleep. Dr. R's Fast Facts Vitamin K Studies to Note: The Role of Vitamin K Status in Cardiovascular Health: Evidence from Observational and Clinical Studies. Assessing vitamin K status in prospective studies and well-designed randomized … [Read more...]