20:1 Extract - The Most Potent On The Australian MarketENERGY | STAMINA | LUNGSPotent 20:1 Extract = 20kg mushroom to create 1kg of powder, twice as strong as 10:1. This Cordyceps strain is known as CS-4. It is grown in a fermentation tank (vegan method). The mushroom fruiting body has undergone a high-pressure dual-extraction to arrive at 20:1 extract.