Medically reviewed by Karina Tolentino, RD Vitamin K deficiency is rare. This vitamin is made naturally by bacteria in the ...

Vitamin K is essential for helping the blood to clot and for preventing excess bleeding. Additionally, vitamin K helps strengthen bones, and may prevent osteoporosis and fractures after menopause.

Several epidemiologic and intervention studies have found that vitamin K deficiency causes reductions in bone mineral density and increases the risk of fractures. Arterial calcification is an ...

Vitamin K deficiency bleeding can occur if vitamin K is not given. The American Academy of Pediatrics recommends a 0.5–1 milligram (mg) dose given intramuscularly (into the muscle) just once to ...

Emerging evidence suggests that adequate vitamin K levels might support cognitive health, particularly as we age. In fact, a 2022 study found that having a higher brain concentration of MK4, a form of ...

When vitamin D intake is recommended due to deficiency, your doctor may suggest taking vitamin K alongside your vitamin D supplement as well. Both are essential for bone and cardiovascular health and ...