Poison center reports rose 39% after supplement was touted as measles cure

When prominent public figures promote unproven treatments during a disease outbreak, the consequences can be measured in emergency room visits. A new study from researchers at Boston Children's Hospital has documented exactly that: after Health and Human Services Secretary Robert F. Kennedy Jr. and podcaster Joe Rogan publicly discussed vitamin A as a potential measles treatment, Google searches for "vitamin A and measles" and "cod liver oil and measles" surged dramatically — and poison control centers recorded a 39 percent increase in pediatric vitamin A exposures compared to the same period the year before.

The study, published this week, examined search trends from January through June 2025, overlapping with the major measles resurgence that ultimately infected more than 1,200 Americans and killed at least three children. The researchers found that search interest in vitamin A and measles stayed relatively flat until February 25, 2025, when it jumped 44 percent overnight and ultimately peaked at 100 percent relative search volume by March 22.

That spike closely followed a series of public statements beginning February 19 that promoted vitamin A as a measles treatment. Interest in cod liver oil, which contains high concentrations of vitamin A, followed a similar pattern, peaking on March 5 at 52.6 percent relative search volume. After the public statements, searches for vitamin A ran 7.5 percentage points higher than projected baseline levels, while cod liver oil searches were 1.3 percentage points above expectations.

The search data tells one part of the story. The clinical data tells the more alarming part. America's Poison Centers recorded 86 pediatric vitamin A exposures nationwide between January 1 and March 31, 2025 — a 38.7 percent increase over the same period in 2024. While vitamin A is available over the counter and generally considered safe at recommended doses, it is a fat-soluble vitamin that accumulates in the body. At high doses, it causes hypervitaminosis A — a condition that can produce liver damage, bone pain, hair loss, blurred vision, and in severe cases, increased intracranial pressure that mimics a brain tumor.

The risk is particularly acute for children. Pediatric bodies process and store fat-soluble vitamins differently than adults, and the threshold between a therapeutic dose and a toxic dose is much narrower. Parents who read online that high-dose vitamin A can treat measles may not realize that the doses being discussed — sometimes 200,000 international units for children — are vastly above the tolerable upper intake level of 600-1,700 IU for kids depending on age.

Vitamin A does have a legitimate medical role in measles treatment. The World Health Organization recommends therapeutic doses for children with measles in populations where vitamin A deficiency is common, because deficiency worsens the severity of the disease. But this is a carefully calibrated medical intervention administered in clinical settings, not a supplement parents should be giving their children at home based on a podcast recommendation.

The study's authors are careful to note that they cannot determine whether the search spike directly caused the increase in poison center calls. Correlation is not causation. But the temporal relationship is striking: public figures promote a supplement, searches for that supplement spike within 24 hours, and poison center calls for pediatric vitamin A exposure rise 39 percent over the same period. The pattern is consistent with what public health researchers have documented with other misinformation cascades — a rapid amplification of incomplete or misleading health claims that produces real-world harm.

The broader context is important. The 2025 measles outbreak was the worst in the United States in decades, driven largely by declining vaccination rates in communities where misinformation about the MMR vaccine has taken hold. The same information ecosystem that amplifies vitamin A as a treatment also amplifies vaccine hesitancy. The result is a population that is both more likely to contract a preventable disease and more likely to pursue unproven remedies for it.

RFK Jr.'s role in this dynamic is particularly significant. As Health and Human Services Secretary, he oversees the agencies responsible for public health messaging, vaccine safety monitoring, and poison control coordination. His public comments on vitamin A carried the implicit weight of his office, even when he couched them as personal opinion. When the person running the health apparatus suggests a supplement might help treat a disease, parents listen — and some of them act on that suggestion in ways that harm their children.

The 39 percent increase in pediatric vitamin A exposures represents 86 individual cases of children exposed to potentially harmful doses of a supplement. Each of those cases involved a real child, a real parent, and a real emergency call. The study does not report how many of those children suffered lasting harm, but hypervitaminosis A in children can cause permanent liver damage and bone abnormalities.

What This Means For You: If you have children and someone — whether a podcast host, a politician, or a social media post — recommends giving them high-dose vitamin A for measles or any other condition, do not do it without consulting a pediatrician first. The WHO-recommended therapeutic doses are for clinical settings in vitamin A-deficient populations, not for home administration in well-nourished American children. Vitamin A toxicity is real, it is dangerous, and it is entirely preventable. The safest, most effective protection against measles remains the MMR vaccine, which has decades of safety data and a 97 percent effectiveness rate after two doses. If your child is unvaccinated and exposed to measles, contact your pediatrician immediately — they can provide appropriate post-exposure prophylaxis that does not involve experimental supplement dosing.