evidence: It is "definitely untrue" that the vitamin K shot is harmful and unnecessary, Dr. Eugene Shapiro, a professor of pediatrics and epidemiology at Yale School of Medicine, told us in an email. [...] Ingredients of Vitamin K Shot Are Safe Misinformation about the safety of vitamin K injections is not new. Just in the past year, our fact-checking colleagues have published at least five articles correcting false or misleading information about the safety of the shot’s ingredients.