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The Daily Insight

What foods will increase your INR

Author

Nathan Sanders

Published Mar 31, 2026

The most common foods with high vitamin K are green leafy vegetables such as kale, collard greens, broccoli, spinach, cabbage, and lettuce.

Do green vegetables make your INR go up or down?

This way, you can maintain you INR as stable as possible. However, if you never eat green vegetables, you don’t have Vitamin K stores, so if you eat a good amount of green vegetables one day, you’ll experience a “peak” of Vitamin K, which will then destabilize your INR.

What causes INR to fluctuate?

Foods with high levels of vitamin K include kale, broccoli, and Brussels sprouts. Other changes to your nutrition, such as starting a new diet or taking new supplements, can also cause your INR level to fluctuate. Talk to your doctor before starting any new diet/nutrition regimens.

Does vitamin K foods increase or decrease INR?

Vitamin K can change how warfarin works, which changes your INR. Vitamin K lowers your INR values. The lower your INR, the less time it takes for your blood to clot.

Does vitamin K thicken your blood or thin it?

Vitamin K helps your blood to clot (thicken to stop bleeding). Warfarin works by making it harder for your body to use vitamin K to clot blood. Changes in the amount of vitamin K that you normally eat can affect how warfarin works.

What foods should not be eaten when taking warfarin?

  • kale.
  • spinach.
  • brussels sprouts.
  • parsley.
  • collard greens.
  • mustard greens.
  • endive.
  • red cabbage.

Are eggs high in vitamin K?

10 Dairy Foods and Eggs High in Vitamin K Dairy foods and eggs are decent sources of vitamin K2. Just like meat, their vitamin content depends on the animal’s diet, and values vary by region or producer.

How do you keep your INR stable?

To keep your INR stable and within the recommended range it is important to: Eat the same number of servings of high Vitamin K foods each week. A good rule is, the greener the plant the higher the Vitamin K level.

What foods will decrease your INR?

  • amaranth leaves.
  • asparagus.
  • broccoli.
  • Brussels sprouts.
  • coleslaw.
  • collard greens.
  • canned beef stroganoff soup.
  • endive.
What vegetables can I eat on warfarin?
  • Kale.
  • Endive.
  • Spinach.
  • Mustard greens.
  • Turnip greens.
  • Collard greens.
  • Swiss chard.
  • Brussel sprouts.
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Can stress raise INR levels?

Stress may affect the length of time your medication stays in your system, potentially causing a spike in your INR levels. Science has shown that because of the effect stress can have on your body, vitamin K antagonists, such as warfarin, can stay in your system longer than normal causing a spike in INR levels.

How long does it take for INR to increase?

The average number of days to achieve therapeutic INR after starting warfarin is reported to be 5-6 days [12].

Does tea affect INR?

Herbal teas. Do not start consuming the following herbal teas and supplements because they may affect the INR, causing it to be too high or too low. If you drink tea, black tea (such as orange pekoe tea) is acceptable because it is not high in Vitamin K.

Is cheese high in vitamin K?

The study examined the vitamin K content in milk, cheese and yogurt and found the amount of vitamin K2 in a dairy food is proportional to the amount of fat in the food. For example, fuller-fat varieties of cheese contain the most vitamin K2, while lower-fat varieties contain less.

Are blueberries high in vitamin K?

Food (no salt added)Serving SizeVitamin K (mcg)Blueberries, frozen, sweetened1 cup41Peas, edible pods, boiled1 cup40

What foods should you avoid while on blood thinners?

  • Leafy greens. Leafy greens like kale, spinach, Brussels sprouts and lettuce contain high amounts of vitamin K. …
  • Green tea. …
  • Cranberry juice. …
  • Grapefruit. …
  • Alcohol.

Can you drink orange juice while taking warfarin?

Research has shown that certain fruits, particularly grapefruit and other citrus juices, can interfere with medication efficacy.

Does milk have vitamin K?

Total vitamin K content of full fat milk, 2% milk, 1% milk and non-fat milk was 38.1±8.6, 19.4±7.7, 12.9±2.0 and 7.7±2.9 μg/100 g, respectively. Reduced fat or fat free dairy products (Greek yogurt, yogurt, cottage cheese and cheddar cheese) contained 8–22% of the vitamin K found in full fat products.

What food helps to thin the blood?

  • Turmeric.
  • Ginger.
  • Cayenne peppers.
  • Vitamin E.
  • Garlic.
  • Cassia cinnamon.
  • Ginkgo biloba.
  • Grape seed extract.

Do eggs affect warfarin?

Foods you can eat on a warfarin diet: Meat, fish, eggs.

Are tomatoes high in vitamin K?

Tomatoes are the major dietary source of the antioxidant lycopene, which has been linked to many health benefits, including reduced risk of heart disease and cancer. They are also a great source of vitamin C, potassium, folate, and vitamin K.

What causes INR to increase?

Some natural health products and other medicines can make warfarin work too well. That can raise the risk of bleeding. If you drink a lot of alcohol, that may raise your INR. And severe diarrhea or vomiting can also raise your INR.

How do I lower my INR fast?

Intravenous vitamin K can lower the INR more quickly than oral vitamin K, but at 24 hours, intravenous and oral vitamin K produce similar degrees of INR correction.

Do bananas thicken your blood?

Bananas. Packed with potassium, bananas can help improve blood flow by lowering blood pressure. Too much sodium in your diet can cause high blood pressure, but potassium helps the kidneys remove extra sodium from your body, which then passes through your urine. This helps relax blood vessels and enable blood flow.

What vegetables thicken your blood?

  • broccoli.
  • Brussels sprouts.
  • cabbage.
  • collard greens.
  • green tea.
  • kale.
  • lentils.
  • lettuce.

What can you not do while on blood thinners?

Because you are taking a blood thinner, you should try not to hurt yourself and cause bleeding. You need to be careful when you use knives, scissors, razors, or any sharp object that can make you bleed. You also need to avoid activities and sports that could cause injury. Swimming and walking are safe activities.

Are cucumbers high in vitamin K?

Cucumber is relatively high in vitamin K. Eating too much cucumber could affect how a person’s blood clots.

Can dehydration increase INR?

Severe diarrhea or vomiting that causes fluid loss and dehydration. This may increase the INR.

Does anxiety affect INR?

The percentage of time in therapeutic INR range differed among the 4 groups. It was 57% in patients without depression or anxiety and those with anxiety only, whereas it was 52% and 53% in patients with depression and those with combined depression and anxiety, respectively.

Can anxiety affect INR levels?

The cases presented here demonstrate that stressful events, physical or psychological, can elevate the INR. The mechanism for this occurrence is unknown, but may be related to decreased metabolism of warfarin during stress.

How often do you check INR on warfarin?

How often do I need an INR? When you first start warfarin, you may need to have blood tests every few days or weekly. When your INR and warfarin dose are stable, blood tests are often done every 2 to 4 weeks, sometimes longer.