Is 200 mcg of vitamin K2 too much?
200 micrograms of vitamin K has no set upper limit. Adults need an adequate intake of 120 micrograms for men and 90 micrograms for women.
General information, not medical advice. Check with a doctor or pharmacist before taking a supplement, especially if you are pregnant or breastfeeding, take any medicine, or are under 18.
In the UK
200 micrograms of vitamin K is within the NHS guidance of 1 milligram (1,000 micrograms) a day from supplements. In the UK, adults need 1 microgram a day for each kilogram of body weight.
The figures
| US (NIH) | UK (NHS) | |
|---|---|---|
| Amount checked | 200 mcg | |
| Answer | No upper limit set | Within NHS guidance |
| Compared with | No upper limit has been set for vitamin K. | 1 milligram (1,000 micrograms) a day from supplements |
| Share of the limit | No limit to compare | 20% of the limit |
| Adults need | An adequate intake of 120 micrograms for men and 90 micrograms for women | 1 microgram a day for each kilogram of body weight |
Good to know
- If you take a blood thinner such as warfarin, talk to your doctor before changing how much vitamin K you get.
Quick answers
- Is 200 mcg of vitamin K2 too much?
- 200 micrograms of vitamin K has no set upper limit. Adults need an adequate intake of 120 micrograms for men and 90 micrograms for women.
- What does the NHS say about 200 mcg of vitamin K?
- 200 micrograms of vitamin K is within the NHS guidance of 1 milligram (1,000 micrograms) a day from supplements. In the UK, adults need 1 microgram a day for each kilogram of body weight.
- What is the upper limit for vitamin K?
- US: No upper limit has been set for vitamin K. UK (NHS): 1 milligram (1,000 micrograms) a day from supplements.
Sources
- NIH Office of Dietary Supplements fact sheet
https://ods.od.nih.gov/factsheets/VitaminK-HealthProfessional/ - NHS vitamins and minerals guidance
https://www.nhs.uk/conditions/vitamins-and-minerals/vitamin-k/
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