VitaHealth Cordyceps Extract is made of the original strain of cordyceps sinensis, Cs-4. Cordyceps sinensis, also known as "caterpillar fungus" or "winter worm, summer grass" has long been used as medicinal fungus. It is highly prized for its restorative and energizing properties. Cordyceps contain a variety 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.