evidence: Guidelines for Vitamin K Prophylaxis [...] - One study published in the British Medical Journal in 1990 raised this concern, suggesting that the risk of cancer was doubled in babies who received vitamin K at birth. [...] References - American Academy of Pediatrics, Committee on Fetus and Newborn. Controversies Concerning Vitamin K and the Newborn. Pediatrics 2003 July; 112(1):191-2.