Rosarin has been shown to reduce fatigue, improve exercise endurance, and increase mental performance. Rosarin is a part of Golden root (Roseroot, Rhodiola rosea L., Crassulaceae). The plant is distributed globally in arctic regions, including Northern Asia, Alaska and northern parts of Europe, and it has been connected to number of biological activities, such as effects on prolyl endopeptidase inhibition, antiallergic effects, effect to memory and learning, antidepressant and anti-inflammatory effects and effects in cancer therapy. The main compounds responsible for these activities are believed to be phenylpropanoid tyrosol, its glucoside salidroside, phenylpropenoids rosin, rosarin and rosavin, which are reported to be pharmacologically active as antioxidants and neurostimulants.