I think that diet is also important for healthy aging, as well as maintaining good teeth. Invest now, even if you have to borrow to do it, get a sound mouth so that you can eat real foods, then eat real foods. Ban processed foods from your kitchen and your life, eat plenty of fruits and vegetables, whole seeds and nuts, whole grains, bright colors, healthy fats, good spices, cook at home. Can make a big difference over a couple of decades;)