Good sources of vitamin K

• green leafy vegetables – such as broccoli and spinach
• vegetable oils
• cereal grains

Small amounts can also be found in meat and dairy foods.

How much vitamin K do I need?

For example, someone who weighs 65kg would need 65mcg a day of vitamin K, while a person who weighs 75kg would need 75mcg a day.

You should be able to get all the vitamin K you need by eating a varied and balanced diet.

Any vitamin K your body doesn’t need immediately is stored in the liver for future use, so you don’t need it in your diet every day.

What happens if I take too much vitamin K?

There’s not enough evidence to know what the effects might be of taking high doses of vitamin K supplements each day.

What does the Department of Health advise?

You should be able to get all the vitamin K you need by eating a varied and balanced diet. If you take vitamin K supplements, don’t take too much as this might be harmful.

Taking 1mg or less of vitamin K supplements a day is unlikely to cause any harm.