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More Americans refusing vitamin K shots for newborns, new study finds

Parental refusal of newborn vitamin K shots in the U.S. rose from under 3% to over 5% between 2017 and 2024, risking serious bleeding in about 200,000 infants, researchers said.

  • Dr. Kristan Scott and colleagues reported Monday in JAMA that parental refusal of newborn vitamin K shots rose nearly 80%, from 2.92% to 5.18% between 2017 and 2024, based on records from more than five million births.
  • Experts say vaccine hesitancy and social media misinformation drive refusals, with Dr. Tiffany McKee-Garrett noting parents often equate vitamin K shots to vaccines or prefer a 'natural' approach.
  • The CDC reports newborns at risk of vitamin K deficiency bleeding are more than 80 times likelier to bleed, with late-onset bleeding up to six months causing about a 20% mortality rate.
  • Clinicians report more refusals and rising vitamin K deficiency bleeding, including hospitalizations and rare intracranial bleeds after home births, with Texas and Houston clinicians and Jaspreet Loyal observing risks.
  • Researchers say oral vitamin K is less reliable, needs multiple doses, and shows weaker protection, prompting calls for more study; AAP recommended shots since 1961, preventing bleeds over 60 years.
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More Parents Refuse Vitamin K Shot for Newborns, Study Finds

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Scientific American broke the news in on Monday, December 8, 2025.
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