Innovative Research Scientific Integrity High Dose Menatetrenone 90 Servings Dietary Supplement Vegan GMP Manufacturing Independent Testing Quality Assured Discussion: Peak K2 is menatetrenone (MK-4), a form of vitamin K2 made in the body form phylloquinone (vitamin K1) and distinct from the menaquinones made by probiotic bacteria. Available science indicates that vitamin K2 - and especially menatetrenone - is superior to Vitamin K1. Clinical trials have shown that high-dose vitamin K2 does not cause excessive or abnormal blood clotting, although it will interfere with "blood thinning" medications.Advanced Orthomolecular Research AOR