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Intranasal vitamin B12 administration is an effective and appropriate method for restoring and maintaining adequate vitamin B12 levels in elderly patients

Effects of vitamin B12 deficiency can result in a range of negative health effects

"The data and hypothesis are very intriguing, but much additional investigation is required to determine if this is a real cause-and-effect phenomenon," said Josh Miller, a professor of nutritional sciences at Rutgers University who was not involved with the study