Exercise, especially the weight bearing kind (almost anything other than swimming) will help increase your bone mass, thereby prevent and/or improving osteoporosis.
Take glucosamine sulfate to help protect joints against osteoarthritis.
In osteoarthritis, the cartilage between the joints tends to deteriorate, destroying the cushion between the joints. Glucosamine appears to stimulate the rebuilding of cartilage by supplying necessary nutrients.
Protecting yourself against the development of and the progression of osteoarthritis can be as easy as reaching for an orange.
Recent studies have shown the importance of vitamin C and other antioxidants in several areas including arthritis. In addition if you happen to be taking methotrexate, a potent medication used in inflammatory conditions, the folic acid in the orange will help reduce side effects to that medication.