a mucopolysaccharide that forms an important constituent of cartilage, bone, and other connective tissues. It is composed of glucuronic acid and N-acetyl-D-galactosamine units. Although it is sold as a supplement to help with joint pain, evidence of any benefit is limited.
A radio-opaque white powder used in X-ray examinations of the stomach and gastrointestinal tract. The barium sulphate may be swallowed to enable the oesophagus, stomach and small and large intestines to be assessed for disorders such as ulceration, tumours, DIVERTICULAR DISEASE and polyps. It may also be inserted into the RECTUM or descending COLON to investigate for possible disease. These procedures are usually done after endoscopy examinations have been carried out.... barium sulphate
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