An extremely rare traditional Chinese medicine The Cs-4 variant of Cordyceps is the much sought after by top athletes High quality organic mushroom extract providing Cordyceps polysaccharides, cordysepic acid & adenosine Isolated from natural Cordyceps sinensis (minimum 20% Cordyceps polysaccharide) Collected from the Qin Hai region of in China Traditional Chinese Medicinal Funghi Cordyceps Sinensis is one of the most valued medicinal fungi in all of traditional Chinese medicine. Once reserved for emperors, this versatile mushroom is now the tonic of China's elite athletes. For natural Cordyceps Sinensis, it takes about six years to complete its life cycle, consequently, the natural product is extremely rare. Due to the scarcity & high price of natural Cordyceps, scientists have developed a variety of mycelial products to be used as the substitutes. Cs-4 is a fermentable strain of the mycelia (Paecilomyces hepiali C.) isolated from the natural Cordyceps sinensis collected from the Qin Hai region in China. It is used to produce fermented mycelia product which contains pharmacologically active compounds similar to the natural Cordyceps sinensis, including cordycepic acid (D-Mannitol), adenosine, & polysaccharides. Reflex® obtain this highly sought after Cs-4 extract direct from China & immediately encapsulate it without any heat or additives to preserve its freshness & strength. Simply put, this product is unmatched in terms of quality.