A widely used joint health supplement may accelerate cognitive decline in vulnerable patients, according to research published today by University of Florida neuroscientists. The study, appearing in Nature Metabolism, found that individuals taking glucosamine faced a 25 per cent greater likelihood of progressing from mild cognitive impairment to Alzheimer's disease. Glucosamine remains one of the most popular over-the-counter remedies for joint pain, particularly among older adults. It is used a