Vitamin K1: what the studies show, and the products
56 of the human studies we graded used vitamin K1, and 17 showed an improvement. Its products are graded on the studies of every form of vitamin k. This page is educational, not medical advice.
What it does, by goalMembersThe top 5 of 6 goals
| Goal | What the studies show | Studies | Dose that worked |
|---|---|---|---|
| Improved in studies 38 studies, 12 showed an improvement, 9 found none, 8 pooled analyses | 38 | 100 mcg | |
| Improved in studies 11 studies, 4 showed an improvement, 1 found none, 4 pooled analyses | 11 | 10 mg | |
| Improved in studies 4 studies, 1 showed an improvement, 2 found none | 4 | 1 mg | |
| Improved in studies 2 studies, 1 showed an improvement | 2 | – | |
| Too few studies 3 studies, 1 found none | 3 | – | |
| Too few studies 1 study, no clear result | 1 | – |
Members see which goal each result is for, and the products for it. Start My 7-Day Free Trial →
Products – highest ranked firstMembersThe top 3 of 4
Dose and safetyThe dose that worked and the upper limit
The studies of vitamin K1 taken by mouth that showed an improvement gave 100 mcg to 10 mg a day.
Biohacker panelMembersWhat our 10 biohackers say about vitamin K1
Questions people askMembersAnswered from the figures on this page
What is vitamin K1 good for?
Answer for members.
How much vitamin K1 a day?
Answer for members.
Can I take vitamin K1 with my meds?
Answer for members.
Members see the answers, checked against their own meds and goals. Start My 7-Day Free Trial →
Educational, not medical advice. Figures come from the human studies on PubMed we have graded; a study counts for a form when it names the form it used. Updated as new studies arrive. How we grade →