Dear Probin,
The Yarsagumba your uncle gave to Pfizer could have been a duplicate sample from the market. Well I must say I am on it and I can provide you the original Yarsagumba. There are rumor pertaining to its aphordisiac and endurance effect a lot thats why it has high demand in the market.
Yarsagumba with its Latin name Cordyceps Sinesis literally means summer plant and winter insect in Nepal and Tibetan. Before the rainy season begins, spores of the cordyceps mushroom settle on the heads of caterpillars’ that lives underground. The fungus gets so much into the body of the caterpillars’ that it grows out through its head and drains all the energy from the insect and ultimately it dies. Yarsagumba, Yarshagumba or Yarchagumba is a rare and unique herb that grows in the meadows above 3,500 meters (11,483 feet) in the Himalayan region of Nepal.