PARENTS-TO-BE and health professionals may be feeling confused about vitamin K injections, until recently used routinely to prevent haemorrhages in newborn babies. Research published last year by the Institute of Child Health, Bristol, suggested a link between the injection and an increased risk of childhood cancer, and many hospitals switched to oral preparations of vitamin K as a result. But a new study from the US involving almost 55,000 children, published in the New England Journal of Medicine, has found no link between vitamin K injections and cancer. The confusion is unlikely to be resolved until a trial at Newcastle University involving one million children is completed.