Supplement 'eases crippling disease

Scientists have produced evidence that a food supplement can help to reduce the long-term suffering associated with the crippling disease osteoarthritis.

Osteoarthritis, or degenerative joint disease, is the most common form of arthritis, most often affecting middle-aged and older people.

The disease, which can cause severe disability and pain, tends to develop in the joints of the neck, lower back, knees, hips and fingers.

However, it may also occur in joints that have been previously injured, or subjected to prolonged heavy use.

Experts estimate that 60% of those aged 65 have moderate to severe osteoarthritis in at least one joint.

It is caused by the degeneration of the cartilage, the protective material that stops bones rubbing together in the joints.