K2 MK4
The short answer. There isn't much data on K2 MK4 yet — 4 mentions, 2 with a clear outcome — so treat these numbers as anecdotal. We found no human trials on PubMed.
From 4 mentions in total — the rest didn't say how it went and aren't counted.
What K2 MK4 does, according to users
Of the people who reported each effect, the share who said it got better.
What the research says
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
No randomized controlled trials in humans found on PubMed. The grade measures how much human research exists — read the conclusions below for what it found.
Dosage people report
As stated by users — not a recommendation. Follow the label or your doctor.
Reported side effects
How often each side effect came up across all reports.
What users say
First-hand experiences, quoted verbatim. We show one positive and one negative where both exist.
“With mk-4 I was able to tolerate a much higher dose (5mg daily) with more noticeable health benefits, and absolutely no side effects...After supplementing for a few months, I went back to the dentist and he was blown away.”
“This happened to me on the mk4. Blood calcium went from 8.9 to 10.4 before switching back to the mk7.”
Top discussions (4)
- Chatgpt may have saved my life ↗
- I was taking the ND d3 k2 tablets I felt like I had vitmain d toxicity is this type of D test useless? ↗
- Thanks to the person who recommended I take magnesium with my vitamin D. Awful side effects are over. ↗
- Need advice for which labido and sexual function supplements to take for trip to visit love interest for first time. ↗
Other options for pain & inflammation
User data from public discussions; research from PubMed. Information only, not medical advice — talk to a doctor before starting, stopping or combining anything. Data updated October 3, 2026. How we rate