What happens if you have too much vitamin K?
Joseph Russell
Updated on May 27, 2026
A sudden change in the amount of vitamin K you get can cause dangerous bleeding (if you consume less) or blood clots (if you consume more).
What are the symptoms of too much vitamin K?
Rare
- Difficulty in swallowing.
- fast or irregular breathing.
- lightheadedness or fainting.
- skin rash, hives and/or itching.
- swelling of eyelids, face, or lips.
- tightness in chest.
- troubled breathing and/or wheezing.
Can too much vitamin K be harmful?
Toxicity is rare and unlikely to result from eating foods containing vitamin K. However, taking any type of supplement can lead to toxicity. Vitamin K can interact with several common medications, including blood-thinners, anticonvulsants, antibiotics, cholesterol-lowering drugs, and weight-loss drugs.Does too much Vit K cause blood clots?
Since the primary deficiency disease associated with vitamin K is bleeding due to impaired blood clotting, it is often thought that high intake of vitamin K may increase thrombosis risk. This is evidently not true.Can too much vitamin K cause a stroke?
These findings indicate that genetic predisposition to higher circulating vitamin K1 levels is associated with an increased risk of large artery atherosclerotic stroke.What happens to your body if you have too much vitamin K?
How long does vitamin K stay in your system?
"Vitamin K1 has a relatively short half-life and is rapidly cleared from the blood and is cleared by the liver within eight hours. In comparison vitamin K2 has a longer half-life of up to 72 hours, meaning it remains biologically active in the body for longer.Does vitamin K thin your blood?
Coumadin is the common brand name for warfarin. To ensure that warfarin is effectively thinning your blood, it's important to eat about the same amount of vitamin K every day. Vitamin K normally helps your blood clot so wounds don't bleed too much. Warfarin works against vitamin K, making your blood clot more slowly.What is the upper limit for vitamin K?
The AI for men and women is 120 and 90 μg/day, respectively. No adverse effect has been reported for individuals consuming higher amounts of vitamin K, so a Tolerable Upper Intake Level (UL) was not established.What does vitamin K do for your skin?
Vitamin K helps protect the collagen in the body. When healthy collagen production is maintained, your skin appears more, plump, smooth and youthful. This means that your skin will be able to maintain its elasticity, hence, preventing wrinkles and fine lines. One study stresses the anti-aging benefits of vitamin K.Which vitamins can you overdose on?
Watch out for these fat-soluble vitamins: A, E and KVitamin A is a fat-soluble nutrient that is naturally present in many foods, like beef, eggs and many fruits and vegetables. An overdose of this vitamin can lead to problems with confusion, hair loss, liver damage and bone loss.