The unsung nutrient: How vitamin K fortifies bones, clots blood and may shield the heart Newborns cannot produce vitamin K and are at risk of severe bleeding; therefore, the American Academy of Pediatrics mandates an intramuscular vitamin K injection within six hours of birth to prevent potentially fatal hemorrhage. Vitamin K is fat-soluble, stored in the liver and fatty tissues, and comes in two forms: K1 (from leafy greens) and K2 (from gut bacteria and fermented foods). The liver needs to produce clotting factors that stop bleeding. Vitamin K is necessary for activating osteocalcin, which binds calcium to bone, but…

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