Rhodiola rosea may help increase resistance to chemical, biological, and physical stressors.* Rhodiola has been found to inhibit stress-induced depletion of important brain neurotransmitters.* The adaptogenic properties of Rhodiola are attributed primarily to this ability to influence the levels and activity of neurotransmitters and the amino acids that mimic the effect of opiates in the brain, such as the beta-endorphins.* Because it is an adaptogen, Rhodiola has the potential to normalize neurotransmitters in the central nervous system without causing drowsiness or fatigue.* In other words, it may help maintain normal levels of brain chemicals but, when they are already normal, Rhodiola will not further affect them.