Parents: the newborn “Vitamin K shot” is not food-based vitamin K. It is a synthetic injection. Hospitals still push it at birth. And if you have a boy and want a circumcision, many hospitals will refuse the procedure unless he gets the shot. What it actually flags: Boxed warning: Fatal hypersensitivity reactions—anaphylaxis, shock, cardiac and respiratory arrest—have occurred during and immediately after the injection, including on the first dose. What’s in it: Synthetic phytonadione, not the vitamin K from food. Depending on the brand: polysorbate 80, benzyl alcohol (linked on the label to gasping syndrome in newborns), and on some labels an aluminum toxicity warning. Preservative-free versions exist. Ask which one they are using. Listed reactions: hypersensitivity, jaundice/hyperbilirubinemia (especially in preemies or with overdose), injection-site reactions, and rare delayed skin reactions. Watch the insert yourself. Don’t outsource the first medical decision of your child’s life to a hallway consent form. That is the point of the video: this is a pharmaceutical product with labeled risks, given in the first hours of life, often with almost no time for parents to read the insert. The circumcision catch many parents don’t hear until they’re already in the hospital. If you want a hospital circumcision for a baby boy, most facilities require the intramuscular vitamin K shot first. Their reason is bleeding risk. Decline the shot and many hospitals will simply refuse to do the circumcision. Decide this before labor—not at 2 a.m. on the postpartum floor. What parents are actually choosing between: Hospitals say babies are born with low vitamin K and that one injection nearly eliminates the risk of vitamin K deficiency bleeding, including brain bleeds. The video and many parents arguing against it say low vitamin K at birth is physiology, not a defect; that the product is synthetic with a boxed warning and excipients they don’t want in a hours-old baby; and that some families prefer maternal diet plus oral natural vitamin K drops instead. Do this before you deliver: Ask which product they use and request the package insert. If you want an in-hospital circumcision, confirm in writing whether they require the shot. If you decline, get that in writing too. Know the warning signs: unexplained bruising, bleeding from the cord or nose, blood in the stool, a pale or lethargic baby, seizures. Late bleeding can show up weeks to months later.