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Preventing a heart attack isn’t just about maintaining a healthy heart. It’s about preserving healthy blood vessels.

You see, when fat builds up in your arteries (plaque), your heart has to work harder to pump blood through them. This is a condition called atherosclerosis, and it’s a leading cause of heart attack and stroke.

The bad news is that about 75 percent of people 60 and older have at least some degree of atherosclerosis.

The good news is that one dinner staple could help you beat those odds.

Researchers calculated the vitamin K1 intakes of 1,436 women using food frequency questionnaires.

The results showed that women with higher intake of vitamin K1 had…

  • 6 percent lower thickness of their carotid artery (a measure of atherosclerosis)
  • Lower atherosclerotic vascular disease events (like heart attacks, strokes, peripheral artery disease, and aneurysms)
  • Lower risk of dying from atherosclerotic vascular diseases.

And it only took 120 micrograms of vitamin K1 daily to see these benefits—and it’s surprisingly easy to get this amount from food.

While leafy greens are your best bet for boosting vitamin K1, a couple of other popular green foods make the list as well.

Take a look at these delicious options:

  • ½ cup cooked mustard greens – 415 mg
  • 1 cup of raw spinach – 145 mcg
  • ½ cup cooked kale – 247 mcg
  • ½ cup cooked beet greens – 349 mcg
  • ½ cup of cooked broccoli – 110 mcg
  • ½ cup cooked Brussels sprouts – 109 mcg

Getting your daily dose of vitamin K1 doesn’t require a complete diet overhaul. Simply adding a side of sautéed spinach to dinner, tossing some kale into your morning smoothie, or roasting Brussels sprouts as a snack can keep your arteries healthy and reduce your risk of heart attack and stroke.

P.S. Eating after dark? Your heart could be a ticking time bomb.

View Sources

Dupuy, M., et al. (2025). Higher vitamin K1 intakes are associated with lower subclinical atherosclerosis and lower risk for atherosclerotic vascular disease-related outcomes in older women. European Journal of Nutrition.


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