BCHE and Hyperglycemia: Dark chocolate:Reduces hyperglycemia in the treated rats.Inhibits the cholinesterase activity in the hippocampal tissue homogenates.Enhances cognitive performance in the spatial memory-related Barnes maze task.Increases cell volume in the CA3 region of the hippocampus.Improves cognitive function and cholinergic activity in the hippocampus while correcting metabolic disturbances in aged NTAD rats.