Vitamin K
Forms & Benefits
Vitamin K comes in two main forms: K1 (phylloquinone) from plants, and K2 (menaquinone) from fermentation. K2, especially MK-7, has superior bioavailability and stays in your blood longer. K2 works synergistically with Vitamin D3 to direct calcium to bones (not arteries). MK-7 from natto (fermented soybeans) is the most studied and effective form.
27 products • sorted by purity: organic → natural → fermentation → synthetic
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Ranked by best value per dollar spent, then by purity and cleanest additives within the same value tier.