Vitamin K2 MK4
People mainly take Vitamin K2 MK4 for recovery, weight loss, performance. Based on 18 first-hand reports and 0 meta-analyses & systematic reviews in the medical literature. Ranked #588 of 1,974 overall.
Of reports that state an outcome, 79% are positive.
What Vitamin 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
Verbatim quotes, shortened only — each links to the original discussion.
“2mg Vitamin K2 MK4”
“I also started taking take Vitamin K2 m4 every other day to help regulate the calcium”
“Vit d will pull calcium into the blood, K2 puts it back into the bones.”
“The minimum effective dose for short chain menaquinones (MK-4) is 1,500mcg. Doses of up to 45mg (45,000mcg) have been safely used in a superloading dosing protocol.”
“I also take it with vitamin K2 MK-4 to move the calcium to my bones.”
Other options for recovery
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 2, 2026. How we rate