Rhodiola contains active compounds rhodioloside, salidroside, and tyrosol which improve mood by regulating the activity of serotonin, dopamine, and norepinephrine–three important neurotransmitters (brain chemicals). Rhodiola protects against oxidative stress induced by exercises and increases glycogen content during exhaustive exercises to combat fatigue and improve athletic performance. Salidroside, a constituent of Rhodiola, appears to protect against beta-amyloid-induced oxidative stress to elevate cognitive function.