Can carotenoids in the brain protect against Alzheimer’s?

Carotenoids are thought to protect against Alzheimer's disease because of their antioxidant properties and their accumulation in the brain. However, a new study from Tufts University is putting the theory into question.

More than a century has passed since the German physician Dr. Alois Alzheimer first presented evidence on the case of Auguste Deter, who at only 51 suffered from severe memory loss and other psychological changes. At autopsy, Dr. Alzheimer found his patient had severe shrinkage and abnormal deposits of the nerve cells.

"That was in 1906," said nutritionist Annie Roe, a USDA researcher at Tufts University, who presented her laboratory's findings on April 21 at Experimental Biology 2012 in San Diego. "There's still disparity among scientists as to the etiology of this rapidly growing disease as we now know as Alzheimer's disease."