Vitamin D is virtually impossible to acquire in adequate amounts from food sources. As a result, supplementation with 5.000-8.000 IU daily is required for many ageing individuals. Often overlooked is the critical importance of vitamin K. If concerned with taking vitamin D, the benefits of vitamin K should not be avoided either. While vitamin D facilitates calcium absorption into the bloodstream, vitamin K helps transport calcium from the bloodstream into the bones. In addition, vitamin K is needed by calcium-regulating proteins in the blood vessels. Together these two vitamins support youthful calcium skeletal distribution while promoting vascular health.
Vitamin K can be found in small amounts in the diet, but obtaining the desired higher quantities requires supplementation. Many Life Extension customers obtain optimal amounts of vitamin K in the Once Daily Health Booster or Super K formulations. An increasing number of new customers, however, ask for vitamin D without taking any supplemental vitamin K.
To address this problem, Life Extension has put together a formula called Vitamins D and K that provides 3.000 IU of vitamin D3 per capsule along with a potent dose of two bioavailable forms of vitamin K.
Read original source