Study of 2 million newborns ties skipped vitamin K shot to higher bleeding risk

A Swedish study of 2 million newborns found that skipping prophylactic vitamin K injections significantly increases the risk of vitamin K deficiency bleeding (VKDB), a potentially life-threatening condition. Vitamin K activates coagulation factors essential for proper blood clotting in newborns who lack adequate stores of this nutrient. As more parents decline this routine shot, researchers documented rising trends in vitamin K deficiency bleeding diagnoses among unvaccinated infants. The findings underscore the critical importance of this preventive measure in protecting newborns from serious hemorrhagic complications during their vulnerable early months of life.

Originally published on
Medical Xpress
Read full article(opens in new tab)Fetched: August 2, 2026 at 10:01 AM



