<https://blog.optimalhealthsystems.com/synergy-of-vitamins-d-and-k-shown-to-lower-risk-of-all-cause-mortality/#article>
<http://schema.org/headline>
"&#8220;Synergy&#8221; of vitamins D and K shown to lower risk of all-cause mortality"
<https://blog.optimalhealthsystems.com/synergy-of-vitamins-d-and-k-shown-to-lower-risk-of-all-cause-mortality/>