Nisha Pandey

US Newborns Are Missing A Crucial Vitamin K Shot Which Can Lead To Brain Bleeding

US Newborns Are Missing A Crucial Vitamin K Shot; It Can Lead To Brain Bleeding

An analysis of health records from more than 1 million births found that the share of <span>newborns</span> whose parents refused the <span>vitamin K</span> shot rose by more than 57% during the first half of 2026. The rate increased from 5.2% to 8.1%, according to <em>Reuters</em>. 

Vitamin K is a routine injection given to newborns within hours of birth. The number may sound like a small percentage but doctors are worried as <span>vitamin K deficiency</span> can cause sudden, potentially fatal bleeding in otherwise healthy babies, including bleeding inside the brain.

<a href="https://www.healthandme.com/health-wellness/childhood-rashes-when-is-home-care-enough-and-when-should-you-see-a-doctor-article-156002520" data-type="tilCustomLink">Vitamin K</a> is essential for blood clotting. Adults get it through food and also produce some through bacteria in the gut.

Newborns, however, are born very little vitamin K. Only small amounts cross the placenta during pregnancy, while the bacteria that help produce the vitamin have not yet become established in a newborn's intestine. Breast milk also contains very small amounts. 

This leaves babies temporarily vulnerable to vitamin K deficiency bleeding, or VKDB. The standard vitamin K injection given after birth is meant to prevent that deficiency from becoming serious.

Also read: <a href="https://www.healthandme.com/parenting/uk-flu-jabs-begin-for-children-and-pregnant-women-what-parents-need-to-know-article-156026521" data-type="tilCustomLink">UK Flu Jabs Begin For Children And Pregnant Women: What You Need To Know</a>

<h2>What Happens If A Baby Does Not Get The Shot?</h2>

The most concerning part about VKDB is that parents may have no warning that something is wrong with the baby. Bleeding can occur internally, including in the intestines or brain. According to the <span>CDC</span>, around 30% to 60% of late VKDB cases involve <a href="https://www.healthandme.com/health-news/small-magnetic-robot-may-reach-difficult-brain-lesions-without-invasive-surgery-how-does-it-work-article-156023816" data-type="tilCustomLink">bleeding inside the brain</a>. 

Late VKDB can occur from one week to six months after birth, often in babies who are born completely healthy. The CDC says newborns who do not receive the vitamin K shot are 81 times more likely to develop severe bleeding than babies who receive it.

Possible symptoms can include unusual sleepiness, irritability, seizures, vomiting, bruising or a bulging soft spot on the baby's head. But importantly, most cases have no warning signs before a life-threatening bleed occurs. 

Also read: <a href="https://www.healthandme.com/parenting/us-woman-gives-birth-to-naturally-conceived-triplets-weighing-nearly-19-pounds-article-156024180" data-type="tilCustomLink">US Woman Gives Birth To Naturally Conceived Triplets Weighing Nearly 19 Pounds</a>

<h2>Why Are More US Parents Refusing It?</h2>

<em>Reuters</em>' analysis found that refusals accelerated sharply this year. Pediatricians and public-health experts linked the trend to growing mistrust of medical interventions and misinformation, amid other changes in US public-health messaging. 

The CDC has historically recommended a vitamin K injection at birth, with the practice dating back decades. Its guidance says the shot is the most reliable way to prevent VKDB. 

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<h2>Doctors Are Concerned About The Current Trend</h2>

<a href="https://www.healthandme.com/health-news/why-has-cdc-challenged-the-report-of-two-measles-deaths-in-pennsylvania-article-156022051" data-type="tilCustomLink">Vitamin K deficiency</a> bleeding is now relatively rare in the US largely because most newborns receive the injection. As the shot has been so effective at preventing the complication, parents may never have seen the condition it prevents.

The concern among pediatricians is that if refusal rates continue climbing, VKDB could stop being a rare neonatal emergency and start appearing more often in hospitals.

For a newborn who looks perfectly healthy, the risk can seem invisible and not so concerning. The problem is that the bleeding the vitamin K shot is meant to prevent can also be invisible until it becomes a medical emergency.

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An analysis of health records from more than 1 million births found that the share of newborns whose parents refused the vitamin K shot rose by more than 57% during the first half of 2026. The rate increased from 5.2% to 8.1%, according to Reuters. Vitamin K is a routine injection given to newborns within hours of birth. The number may sound like a small percentage but doctors are worried as vitamin K deficiency can cause sudden, potentially fatal bleeding in otherwise healthy babies, including bleeding inside the brain.Why Do Newborns Need Vitamin K?Vitamin K is essential for blood clotting. Adults get it through food and also produce some through bacteria in the gut.Newborns, however, are born very little vitamin K. Only small amounts cross the placenta during pregnancy, while the bacteria that help produce the vitamin have not yet become established in a newborn's intestine. Breast milk also contains very small amounts. This leaves babies temporarily vulnerable to vitamin K deficiency bleeding, or VKDB. The standard vitamin K injection given after birth is meant to prevent that deficiency from becoming serious.Also read: UK Flu Jabs Begin For Children And Pregnant Women: What You Need To KnowWhat Happens If A Baby Does Not Get The Shot?The most concerning part about VKDB is that parents may have no warning that something is wrong with the baby. Bleeding can occur internally, including in the intestines or brain. According to the CDC, around 30% to 60% of late VKDB cases involve bleeding inside the brain. Late VKDB can occur from one week to six months after birth, often in babies who are born completely healthy. The CDC says newborns who do not receive the vitamin K shot are 81 times more likely to develop severe bleeding than babies who receive it.Possible symptoms can include unusual sleepiness, irritability, seizures, vomiting, bruising or a bulging soft spot on the baby's head. But importantly, most cases have no warning signs before a life-threatening bleed occurs. Also read: US Woman Gives Birth To Naturally Conceived Triplets Weighing Nearly 19 PoundsWhy Are More US Parents Refusing It?Reuters' analysis found that refusals accelerated sharply this year. Pediatricians and public-health experts linked the trend to growing mistrust of medical interventions and misinformation, amid other changes in US public-health messaging. The CDC has historically recommended a vitamin K injection at birth, with the practice dating back decades. Its guidance says the shot is the most reliable way to prevent VKDB.       Doctors Are Concerned About The Current TrendVitamin K deficiency bleeding is now relatively rare in the US largely because most newborns receive the injection. As the shot has been so effective at preventing the complication, parents may never have seen the condition it prevents.The concern among pediatricians is that if refusal rates continue climbing, VKDB could stop being a rare neonatal emergency and start appearing more often in hospitals.For a newborn who looks perfectly healthy, the risk can seem invisible and not so concerning. The problem is that the bleeding the vitamin K shot is meant to prevent can also be invisible until it becomes a medical emergency.