Seniors who are concerned about taking preemptive aging steps to safeguard their senior health need to take the first step and choose foods that promote senior health.  The foods at the top of the preemptive list are the foods that preempt cancer which is one of the leading enemies of senior health.  The good news for seniors is a follows.  Foods that preempt cancer are some of the tastiest foods around.  In the first place are all the colorful berries that include blueberries, blackberries, cranberries, raspberries, strawberries, and so on.   Most of the berries contain tumor fighting compounds such as polyphenols and ellagic acid which are the enemies of cancer.  Another winner is chocolate as long as it is 70% cocoa which is true for some of  dark chocolate bars.  It turns out that cocoa contains polyphenols similar to the berries and it also contains antioxidants.  As an added bonus, cocoa contains a class of chemicals known as catechins that offer protection against cancer and heart disease.  Finally seniors can moderately choose daily to imbibe a glass of red wine for its high concentration of resveratrol content that is provided by the grape skin.  The resveratrol contributes in some unknown way to suppress metabolites associated with cancer growth.  In summary, drinking a daily glass of red wine, eating some dark chocolate,  and consuming a variety of berries throughout the week can provide an array of preemptive aging foods for seniors who are concerned about protecting their senior health against cancer.