A slow, chronic starvation of the brain as we age appears to be one of the major triggers of a biochemical process that causes some forms of Alzheimer’s disease. A new study from Northwestern University’s Feinberg School of Medicine has found when the brain doesn’t get enough sugar glucose — as might occur when cardiovascular disease restricts blood flow in arteries to the brain — a process is launched that ultimately produces the sticky clumps of protein that appear to be a cause of Alzheime