World Cancer Research Fund (WCRF) was involved in the research and they also feel an in-depth look into the association between blood vitamin B levels and cancer risk is warranted. Dr Panagiota Mitrou, of the WCRF, said, These findings are really exciting as they are important for understanding the process of lung cancer and could have implications for preventionBut while this is an important study, it is vital that we get the message across to smokers that increasing intake of B-vitamins is not - and never will be - a substitute for stopping smoking. Dr Joanna Owens, of Cancer Research UK also said, Although this study suggests a link between vitamin B levels in the blood and reduced risk of lung cancer, this doesn't prove that vitamin B can directly protect against the disease...Vitamin B levels might be higher in people who eat a healthy diet, and this in itself can help reduce the risk of cancer. The most important way to prevent lung cancer is to stop smoking. No amount of vitamins can counteract the risks posed by smoking, she concluded.