Rhodiola Rosea and Mental Performance Posted by Nustait Admin on October 22, 2019 Rhodiola rosea in stress induced fatigue–a double blind cross-over study of a standardized extract SHR-5 with a repeated low-dose regimen on the mental performance of healthy physicians during night duty. Phytomedicine. 2000 Oct;7(5):365-71. Darbinyan V, Kteyan A, Panossian A, Gabrielian E, Wikman G, Wagner H.