Follow this advice and you will live long. Eat plenty of vegetable with a little meat preferably fish or white meat. Take carbohydrates in moderation and after age 40, reduce the amout of carbo. At this stage, you can cut out the meat and replace with lentils. This is the age where people tend to be religious and more moral minded so it serves both purposes.
Lentils contain lots of uric acid. This may not be so good for the joints. Soy is a better alternative.
Anyway, living long or not is not as important as living meaningfully. We can't control how long we can stay on this earth, even as we may try hard. But we can change how we live and who we die with.