A new blood test out of Germany may help detect Alzheimer’s disease more that 15 years before symptoms show. The test involves looking for key markers in the blood using an infrared sensor. The new test was discovered by research teams at the university and German Center for Neurogenerative Diseases, and by researchers at Ruhr-Universität Bochum. These researchers are now putting their new blood test through the paces in human trials, to make sure it is an effective test. Those in the know will tell you that a major problem with Alzheimer’s is, by the time symptoms appear and a diagnosis is made, there’s already been massive irreversible damage to the brain.