Vitamin B2 can ward off migraines, says a recent European study team. Researchers at the General Hospital of Luxembourg, Belgium, split 55 migraine patients into two groups. One took 400 milligrams of Vitamin B2 every day for four months, the other, a placebo. At the end of the trial, 59 per cent of vitamin B2 group and only 15 per cent of placebo patients said their headache frequency had fallen by at least half. The team says that vitamin B2 could be as effective as current drug treatments, and have fewer side effects.