French Mush is the only player in the world to cultivate and extract on European soil. Our ultrasound extraction technique allows for 92% bioavailability. French Mush extracts are therefore 4 to 8 times more effective than average. French Mush extracts are clinically proven for their effectiveness and the active compounds they contain. We are certified French organic agriculture. Tested in an independent laboratory. French Mush dietary supplements based on organic medicinal mushroom extracts made in France, certified Organic Agriculture AB. Certified 100% Organic. Ultrasound extraction. Made in France. For millennia, Reishi has been the most well-known mushroom in traditional Chinese medicine. It is nicknamed the mushroom of immortality. Due to its rarity, its use was reserved only for Chinese emperors.