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At least 26 million people suffer the ravages of the mind-wasting disease known as Alzheimer's - a degeneration of the brain for which there is currently no cure.

But now a new study is offering hope to those in the early stages.

Researchers at Oxford University in the UK have discovered that high doses of vitamin B appear to slow - if not stop - the advance of the disease.

Al Jazeera's Tarek Bazley has the details.

Source: Al Jazeera