Vitamin K2 MK-4
Directs calcium to bones, supports cardiovascular health.
Dose & timing
- 5 mg — daily
Why it’s in the stack
MK-4 is the K2 form most concentrated in brain, pancreas, salivary glands. Japanese osteoporosis trials use exactly 45 mg/day (10× this); 5 mg is a more conservative consumer dose. Half-life is short (~1–2 h), so daily dosing — not weekly — matters.
Caveats
- Interacts with anticoagulants (warfarin, acenocoumarol). If you take blood thinners, talk to your doctor before starting any K supplement.
Where to buy on Amazon
| United States (Amazon.com) | Buy on Amazon.com ✓ verified ASIN |
| United Kingdom (Amazon.co.uk) | Buy on Amazon.co.uk ✓ verified ASIN |
| Germany (Amazon.de) | Buy on Amazon.de ✓ verified ASIN |
| France (Amazon.fr) | Buy on Amazon.fr ✓ verified ASIN |
| Spain (Amazon.es) | Buy on Amazon.es ✓ verified ASIN |
| Italy (Amazon.it) | Buy on Amazon.it ✓ verified ASIN |
| Poland (Amazon.pl) | Buy on Allegro — 32,90 zł |
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FAQ
Where can I buy Vitamin K2 MK-4?
Vitamin K2 MK-4 is available on Amazon in the US, UK, Germany, France, Spain, Italy and Poland. This page links each marketplace directly — to a verified product listing where one exists, otherwise to a targeted Amazon search built from the product, dose and brand hint.
What dose of Vitamin K2 MK-4 does the Blueprint protocol use?
5 mg — daily.
Why is Vitamin K2 MK-4 in the longevity stack?
MK-4 is the K2 form most concentrated in brain, pancreas, salivary glands. Japanese osteoporosis trials use exactly 45 mg/day (10× this); 5 mg is a more conservative consumer dose. Half-life is short (~1–2 h), so daily dosing — not weekly — matters.