BACKGROUND: Arthritis is inflammation of one or more joints. A joint is the area where two bones meet. There are more than 100 different types of arthritis. Arthritis involves the breakdown of cartilage. Cartilage normally protects a joint and allows it to move smoothly. It also absorbs shock when pressure is placed on the joint. Without a normal amount of cartilage, bones rub together, causing ...

Vitamin C protects cartilage, the shock absorber between bones.

Golfer Phil Mickelson has openly talked about his experience with psoriatic arthritis. It's a type of arthritis unlike the others and can fuse joints, destroy bones, or both!

Robyn Nichols always knows when it's going to rain. She can feel it in her bones -- literally.

TUCSON - Do you have painful bones and swollen joints? If you answered yes, you're probably one in every three Arizonans who is affected by some form of arthritis.