03 Oct 2017 --- A study of 766 otherwise healthy adolescents has shown that those who consumed the least vitamin K1 were at 3.3 times greater risk for an unhealthy enlargement of the major pumping chamber of their heart. Vitamin K1, or phylloquinone, is found in spinach, cabbage, iceberg lettuce and olive oil and is the predominant form of vitamin K in the US diet.
