Are vitamin K supplements safe for pregnant or nursing women?

Tieraona Low Dog, MD
General Practice
Vitamin K is included in almost all prenatal supplements, so it's safe for pregnant and nursing women to take. In this video, integrative medicine specialist Tieraona Low Dog, MD, explains why additional supplementation is probably unnecessary.
When taken as directed, vitamin K supplements are considered safe for pregnant or nursing women. Women ages 19 and older are encouraged to get 90 mcg of vitamin K daily, whether they are pregnant or nursing or not, and a healthy diet will often provide that without a need for supplements. That said, vitamin K used medicinally in adults (as for blood clotting disorders) is considered a class C drug by the FDA, meaning it is not certain if it is safe for pregnant women and it is not known if it is transferred through breast milk. 

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