What we use: Phylloquinone (K1) AND MK-7 (K2)²¹,²²

What it does:

• Makes your blood clot when you get cut²¹
• Turns on proteins that help calcium reach your bones and stay out of your arteries²¹
• Turns on proteins that do various jobs²¹
• Keeps bones strong²¹

When you don't get enough:

• Bleed too much from small cuts²¹
• Bruise super easily²¹
• Women get heavy periods²¹
• Blood shows up where it shouldn't (in pee or poop)²¹
• Babies without enough can have bleeding in their brain²¹

Why we pay more for BOTH forms: Most companies use just K1 (if they use any at all). K1 and K2 both help your blood clot and your bones use calcium. Think of vitamin K as helping calcium get to your bones and stay out of places it can cause trouble, like your arteries.²¹ K2 (specifically MK-7) sticks around much longer: its level in your blood takes about 68 hours to drop by half, compared with hours for K1.²² Using both costs way more than just K1, but your bones and heart are worth it.