The longest-lived cultures in the world are Asian cultures, such as the Japanese, Chinese, Koreans, Laotians. Many Asian countries border water--fishing was very early established as a perfect means of food. Fish are some of the healthiest food people can get. Rice is also a most common food in Asia, and is also quite healthy.
Antioxidants to keep blood clean can be found in tea, common not just in Asia but many places. Water is the best thing you can drink, however--it's the most natural thing in the world, and even makes up more than 70% of our own bodies.
If you want a more detailed rundown of diets that would help you live longer, I highly suggest finding good Asian diet hubs. I know there are plenty.