Women who consume eight or more drinks per week are considered excessive drinkers, according to the CDC. Breast cancer, liver disease and heart disease have all been linked to excessive drinking over time. Ann Boyajian/Illustration Works/Corbis hide caption

itoggle caption Ann Boyajian/Illustration Works/Corbis

A tangle of protein (green) in this scanning electron micrograph of a brain cell of an Alzheimer's patient lies within the cytoplasm (blue) of the cell. The tangle consists of clumps of a toxic form of tau. Thomas J. Deerinck/Corbis hide caption

itoggle caption Thomas J. Deerinck/Corbis