When leafy green vegetables are frozen, do they lose their vitamin K? My husband tries to eat kale, etc., because he takes blood thinners and wants a good natural source of this vitamin. But he read somewhere that frozen greens lose vitamin k in the freezing process. Any truth to this?
No, leafy green vegetables do not lose their vitamin K when frozen. In fact, ounce per ounce, frozen greens have slightly more vitamin K when fresh. This is because when greens are frozen, they lose some water, which slightly concentrates the nutrient. This is not true for all nutrients, though - certain nutrients are lost with the water, such as vitamin C. Best of luck with the greens!