An alteration in a gene may speed up the loss of memory and thinking skills in people who are already at the risk of Alzheimer's disease, according to a study. According to researchers, people with Alzheimer's risk, who have the gene mutation called the BDNF Val66Met allele, or the Met allele may have a more rapid decline of memory and thinking skills. Further, people with the gene mutation, who also had more beta-amyloid -- a sticky protein that can build up into plaques found in the brains of people with Alzheimer's disease -- had an even steeper rate of decline. Because this gene
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