Astragalus has shown to be a strong immune-system enhancer herb and superior tonic, aiding in recovery from illness and surgery. It combats fatigue by nourishing exhausted adrenals. It is an adaptogen credited with promoting the long life of the cell. It increases the strength of T- cells. T- cells are the  white blood cells that attack the invaders that cause diseasein the body. It appears to protect healthy cells even when chemotherapy is used. It has shown to increase energy by reducing toxicity in the liver. Astragalus also helps blood pressure, dilates blood vessels and increases endurance to fatigued hearts.