Six years after it began publishing studies on whether vitamin K given to newborns increases their risk of childhood cancer, the BMJ has weighed in with 4 new entries that continue the debate.
Intramuscular vitamin K given at birth to prevent bleeding was recommended in 1991 in the United Kingdom. At about the same time, however, an association between vitamin K prophylaxis and childhood cancer was reported. But later studies reported no evidence to support such a link.
Voelker R. Vitamin K Controversy Continues. JAMA. 1998;279(6):420. doi:10.1001/jama.279.6.420-JWM81008-5-1