Cordyceps Sinensis is made of the original strain of cordyceps sinensis, Cs-4. Cordyceps sinensis, also known as "caterpillar fungus" or "winter worm, summer grass" has been long used as medicinal fungus to improve blood circulation, energy and vitality, contributing to overall good health and well-being. It is highly prized for its restorative and energizing properties. Cordyceps contain high levels of nutrients such as adenosine, cordycepin, cordycepic acid, polysaccharides, 16 essential amino acids, vitamins A, B, C and K. Cultivated Cs-4 is free of fungi, bacteria or heavy-metal contamination. It is stable and has a consistent quality.