We can supply Rhodiola Rosea extracts 3%rosavin, its main functions as follows: Help maintain energy levels and improve endurance levels. May improve protein metabolism Anti-anoxia, anti-fatigue and anti-cold Help memory & mental performance May increase physical strength & mobility and shortens recovery after workouts. Adjust immunization function, effecting dual-adjusting activities to improve both brain and physical function, anti-aging May help fight depression & emotional stree.