But don't start taking supplements yet, says one charity rep
                                
                                
                                    (Newser) -
                                    Vitamin B has already  been linked to Alzheimer’s , but new evidence shows that vitamin B-12, specifically, may help to fend off the disease. In a recent study of 271 people published in the Neurology journal, those with the highest levels of B-12 were the least likely to have dementia,...