Rhodiola improves physical and mental efficiency, reduces fatigue in situations of prolonged stress. Rhodiola also has neuroprotective effect and according to preliminary studies, it has potential to prolong life. Supplementation is usually used in form of extract of SHR-5(or its equivalent), or an extract containing 3% Rosavins and 1% salidroside. The dose of 50 mg is enough to prevent fatigue. Taking Rhodiola ad hoc,in the case of stress, is effective in doses about 288-680 mg.