References used for all of the nutrient pages can be found at the bottom of the Nutrition Facts page. Click here.
How Much Vitamin K Do I Need?
AI for Adult Females is 90 mcg/d
AI for Adult Males is 120 mcg/d
Upper Safe Limit has not been determined
Adequate Intake (AI) is developed when there is not enough scientific evidence to establish a RDA (Recommended Dietary Allowance)
Why Do I Need Vitamin K?
Vitamin K is needed to synthesize blood clotting proteins and is needed during the formation of bones
Green leafy vegetables are the richest source of vitamin K
Vitamin K Content (mcg)
Kale, raw, 1 cup
Chard, cooked, 1 cup
Spinach, raw, 1 cup
Romaine lettuce, raw, 1 cup
Cabbage, cooked, 1 cup
Broccoli, cooked, 1/2 cup
Eating large amounts of vitamin K can decrease the effectiveness of some anti-clotting medications
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