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. Cordyceps attracted public attention in 1993 when a group of Chinese runners broke nine world records in the World Outdoor Track and Field Championships in Germany. Afterwards the coach partially attributed those results to the athletes use of a Cordyceps-based tonic.

Studies have looked at the immuno-modulating and immuno-regulating activities of Cordyceps and its uses in supporting renal health and respiratory health.

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 and 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 QinHai 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 (mannitol), adenosine, and polysaccharides.

Reflex Nutrition obtain this highly sought after Cs-4 extract direct from China and immediately encapsulate it without any heat or additives to preserve its freshness and strength. Simply put, this product is unmatched in terms of quality.