Want to know the secret of healthy aging. According to a research, people who eat a balanced diet, don`t smoke, and exercise regularly lead longer, healthier lives. The following tips can help you focus on foods for key parts of the body that are important to healthy aging: - Bones: String cheese is not just for the young. Add calcium to your diet by snacking on a stick of string cheese when hunger strikes. - Muscles: For a quick and easy snack, look for a nutrition bar with added soy protein or add a packet of soy or whey protein to your favourite smoothie. - Eyes: Punch up your intake of the eye-popping nutrients lutein and zeaxanthin by making a spinach salad with slices of oranges. Many multivitamin and mineral dietary supplements also include lutein. - Heart: Popcorn is a great source of whole grains. - Mind: Salmon or tuna that is canned in water or in a shelf-stable pouch can make easy and affordable meals. A positive attitude and regular physical activity are also key to maintaining good health at any age.