Protect your DNA with pyridoxine (vitamin B6) and methionine.

An analysis that included nearly 400,000 participants finds that those with higher blood levels of vitamin B6 and the essential amino acid methionine (found in most protein) had an associated lower risk of lung cancer, including participants who were current or former smokers, according to a study in the June 16 issue of JAMA.

Previous research has suggested that defi­ciencies in B vitamins may increase the probability of DNA damage and subse­quent gene mutations. "Given their involvement in maintaining DNA integrity and gene ex­pression, these nutrients have a potentially important role in inhibiting cancer devel­opment, and offer the possibility of modi­fying cancer risk through dietary changes," the authors write. They add that deficiencies in nutrient levels of B vitamins have been shown to be high in many western populations.

If you eat cereal then look for fortified cereals that are especially high in B6. Also, banana, whole potatoes in skin, salmon, turkey, chicken and spinach are all good sources. Ditto garbanzo beans. Plus, liver, rabbit, hazel nuts, cashews, and peanuts are all good sources. Wheat germ is a better source than all these other foods. You can find a much more detailed break-down of B6 in foods here.