Australian parents refusing vitamin K for newborns as social media misinformation spreads

Across Australia, fewer parents are consenting to vitamin K injections for their newborns. The decline is steady and measurable. In Queensland, the proportion of babies receiving the treatment dropped from 98.3 percent in 2016 to 95.5 percent by 2025—a shift that meant more than 2,500 infants went without the injection last year. Tasmania shows a similar pattern: 99 percent of babies received vitamin K in 2016; nine years later, that figure had fallen to 97 percent. Health professionals suspect the trend is national, though other states don't formally track the data. The reason, experts say, is straightforward: misinformation spreading through social media, amplified by influencers and algorithmic targeting that reaches parents already skeptical of medical interventions.

Vitamin K is not a vaccine, but it has become entangled in anti-vaccination discourse online. Newborns are born with minimal vitamin K stores—the nutrient that allows blood to clot properly. Without a dose at birth, they face a small but serious risk: vitamin K deficiency bleeding, a rare condition affecting roughly one in 100,000 babies that can cause intracranial hemorrhage and death. On TikTok and Instagram, influencers with tens of thousands of followers make claims that vitamin K contains dangerous chemicals, causes jaundice, or links to childhood cancers and leukaemia. Some describe it as a "murder weapon." The claims are medically unfounded. Yet the algorithm works in their favor. "If it identifies people who are anti-vaccination then the algorithm may well target them with information to say, 'Do not give your baby vitamin K'," said Elizabeth Elliott, a professor of pediatrics and child health at the University of Sydney. Danielle McMullen, president of the Australian Medical Association, noted that the qualifications of those spreading this information are often unclear—and some content is now artificially generated.

The medical record is unambiguous. A 24-year study by the Australian Pediatric Surveillance Unit documented 58 cases of vitamin K deficiency bleeding between 1993 and 2017. Six infants died, all from intracranial hemorrhage. Three of those deaths were associated with home delivery and parental refusal of the injection. The intramuscular vitamin K shot has been in routine use since the 1960s with only one documented case of a potential allergic reaction. "The risks of giving this are really low and certainly outweighed by the benefit of preventing potentially life-threatening bleeds," McMullen said. Babies are most vulnerable in their first eight weeks of life, particularly if born via instrumental delivery or with underlying liver problems. Vitamin K does not cross the placenta from mother to child, and breast milk contains only trace amounts.

The refusal trend is not confined to Australia. In the United States, vitamin K refusals nearly doubled between 2017 and 2024, rising from 2.9 percent to 5.2 percent according to a recent study analyzing five million health records. The phenomenon has become associated with home births and broader vaccine hesitancy. In April, Robert F. Kennedy Junior, now the U.S. Health Secretary, faced criticism during a congressional hearing for his stance on the injection. Democratic politician and former pediatrician Kim Schrier called it the "RFK Junior spillover effect"—spreading misinformation that scares and confuses parents. Kennedy denied having made statements against vitamin K, yet the damage to public confidence persists.

Lucy Chapin, an accredited nurse and midwife in Vermont, has watched the consequences unfold. Colleagues have reported an increase in babies presenting with complications from vitamin K deficiency bleeding. After seeing medically debunked videos online, Chapin began sharing accurate information about the injection on her Instagram account. A mother named Kellie contacted her with a story. Kellie had concerns about the contents of the vitamin K injection and, despite her home-birthing midwife's recommendation, chose not to give it to her son, Austin. At 15 days old, Austin developed a scratch on his cheek that would not scab, bleeding from his heel prick that would not stop, and bruising accompanied by fussiness. In the emergency department, doctors found he was bleeding on his brain. He received intravenous vitamin K and survived, but the outcome could have been fatal.

Health professionals are now emphasizing the need for earlier, clearer communication. McMullen urged parents to ask questions about vitamin K while pregnant, before the stress and time pressure of the immediate postpartum period. Elliott suggested that health professionals themselves may lack confidence in explaining the benefits, and that better training and education could help them communicate more effectively with skeptical families. The challenge is not new—vaccine hesitancy and medical mistrust have deep roots—but the speed and reach of social media has accelerated the spread of false claims and made the work of correction harder. What remains clear is that a preventable condition, one that has claimed lives and caused lasting disability, is becoming more common again because parents are being fed false information by people with no medical expertise and no accountability.