Est. 1973 Dietary Supplement Immune Support Lab Verified Nutrition A Brighter Way Since 1973, we've scoured the globe for the highest quality ingredients, connecting you with the most efficacious supplements that help you live brighter and embrace the moments that matter most. Discussion: Reishi Mushroom, also known as "Ling Zhi" in Traditional Chinese Medicine, have a long history of use dating back over 4,000 years. They are often referred to as 'mushrooms of immortality' in many Asian cultures, due to their potential health benefits.