Newborn Vitamin K Shots: Why More Parents Are Refusing Them
A single injection given shortly after birth can protect babies from dangerous bleeding. However, more parents in the United States are declining this routine newborn treatment.
A new study published in JAMA on November 5, 2026, found that the number of newborns missing the vitamin K shot more than doubled between 2017 and 2025.
Researchers also found that babies who did not receive the shot had a higher risk of bleeding during their first six months.
The findings raise concerns about newborn vitamin K shots and the growing number of families refusing them. Doctors warn that vitamin K deficiency bleeding can cause brain damage and even death.
Newborn vitamin K shots: What the new study found
Researchers from the Children's Hospital of Philadelphia and other institutions analyzed medical records from more than 5.2 million babies.
The records covered births between 2017 and 2025.
The percentage of newborns who did not receive the vitamin K shot increased from 3.1% in 2017 to 6.8% in 2025.
The researchers also compared bleeding events among babies who received the injection and those who did not.
They found that babies who missed the shot had:
- 47% higher risk of bleeding: The rate was about 288 cases per 10,000 babies without the shot, compared with 186 among babies who received it.
- More than twice the risk of brain bleeding: The risk was about 33 cases per 10,000 babies without the shot, compared with 13 among those who received it.
- Higher risk of death with a bleeding diagnosis during the birth hospitalization: The rate was 2.9 per 10,000 babies without the shot, compared with 1.1 among babies who received it.
These figures show a strong association between missing the injection and bleeding. However, the study was observational, so it cannot prove that refusing the shot caused every reported event.
Why do newborns need vitamin K?
Vitamin K helps the body form blood clots. Without enough of it, a baby may bleed too easily.
Newborns naturally have very low vitamin K levels. Only small amounts pass from the mother to the baby during pregnancy. Breast milk also contains relatively little vitamin K.
This creates a risk of a condition called vitamin K deficiency bleeding, or VKDB.
The condition can happen during the first six months of life. It may cause bleeding inside the stomach, intestines, or brain.
For example, a baby may appear healthy after leaving the hospital. Weeks later, serious bleeding can develop without an obvious warning.
According to the Centers for Disease Control and Prevention (CDC), about half of babies with late VKDB experience bleeding in the brain. This can cause permanent brain damage.
The CDC also reports that one in five babies who develop VKDB dies.
Why are more parents refusing the vitamin K shot?
Parents have different reasons for declining the injection.
Some worry about the ingredients, possible side effects, or pain from the needle. Others prefer natural approaches or have concerns about medical procedures given shortly after birth.
Some parents also confuse the vitamin K injection with a vaccine.
However, the vitamin K shot is not a vaccine. It provides a vitamin that babies need to help their blood clot normally.
Concerns about a cancer link have also circulated for years. An early study raised this possibility, but later research did not confirm the connection.
Parents deserve clear answers about treatments given to their babies. They should be able to discuss ingredients, safety, and possible side effects with their healthcare providers before making a decision.
Is the newborn vitamin K shot safe?
The vitamin K injection has been recommended for newborns in the United States since the early 1960s.
It is usually given once into a baby's thigh muscle shortly after birth. It protects during the months when babies are most vulnerable to VKDB.
The CDC
identifies the injection as the best way to prevent vitamin K deficiency bleeding.
Some parents ask about oral vitamin K instead. However, oral doses do not provide the same level of reliable protection as injections. They may require repeated doses, and babies can miss later doses.
Parents considering alternatives should discuss the risks with their baby's healthcare provider.
What should parents do before refusing the shot?
Parents who have concerns should speak with their pediatrician or maternity care team before making a decision.
Ask why the injection is recommended, what ingredients it contains, and what could happen if your baby does not receive it.
It is also important to understand that waiting for warning signs may be dangerous. Some babies develop serious internal bleeding without visible symptoms beforehand.
For example, a baby may feed normally and appear comfortable before developing sudden bleeding inside the brain.
If a baby has unusual bruising, bleeding from the nose or umbilical cord, or unexplained paleness, seek medical care immediately. Do not wait for symptoms to become severe.
What are the study's limitations?
The researchers reviewed electronic health records. They did not randomly assign babies to receive or miss the injection.
Therefore, other differences between the two groups may have affected the results. The study also included babies born between 35 and 43 weeks of pregnancy, so its findings may not represent every newborn.
Still, the large number of records provides important evidence of the growing trend of refusal and its possible consequences.
The Bottom Line
The newborn vitamin K shot is a simple treatment that helps prevent a rare but potentially deadly condition. New research found that more parents are declining it, while babies who miss it face higher bleeding risks.
Parents should have their concerns answered by qualified healthcare professionals. Understanding the benefits and risks can help families make informed decisions that protect their newborns.
Frequently Asked Questions
Is vitamin K a vaccine?
No. Vitamin K is a nutrient that helps blood clot. The injection does not vaccinate babies against an infection.
Can a newborn develop bleeding weeks after birth?
Yes. Late vitamin K deficiency bleeding can occur from one week to six months after birth. It often develops without warning signs.
Can breastfeeding provide enough vitamin K?
Breast milk contains relatively low amounts of vitamin K. Breastfed babies still need the recommended vitamin K protection after birth.
Does the vitamin K shot prevent brain bleeding?
Yes. The injection greatly reduces the risk of vitamin K deficiency bleeding, including bleeding inside the brain.
