Eleuthero's eleutherosides and complex polysaccharides (complex sugar molecules) function as an adaptogen. Eleuthero optimizes the adrenal secretion of stress-fighting hormones. Eleuthero has been shown to enhance mental acuity and physical endurance without the letdown that comes with caffeinated products. There is little doubt that Eleuthero can heighten mental alertness and improve concentration. It may be helpful in the early stages of Alzheimer's.