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Vitamin K

Two common forms are K1, found in leafy green vegetables, and a kind of K2 called menaquinone-7 (MK-7), found in fermented foods like cheese and natto (fermented soybeans). Without enough vitamin K, blood can’t clot properly if you’re injured. Preliminary research suggests the MK-7 type may help prevent atherosclerosis and osteoporosis.

Tip: Check with your doctor before increasing vitamin K intake if you’re on an anticlotting medication.

Daily dose: 45–180 mcg MK-7

Try: Carlson K Complete